Aluminium bronze C95400 C954

spore: profile
id: bronze-c954
spore_version: 0.2
family: copper-alloys
name: Aluminium bronze C95400
abbreviation: C954
role: cast bearing, gear and marine alloy
category: metals
type: copper-alloys
summary: |
  Aluminium bronze C95400 (UNS C95400, ASTM B505 and B148, SAE 68A) is a copper alloy with 10.00 to 11.50 % aluminium and 3.00 to 5.00 % iron, cast for bearings, gears, valve parts and marine hardware. Its density is 7.45 g/cm3 and it melts between 1027 and 1038 °C. The continuous-cast grade has a minimum tensile strength of 586 MPa as cast and 655 MPa heat treated, with 12 % and 10 % minimum elongation (Concast). Seawater attack is rated low in general, but dealuminification can leave a weak, porous copper residue. For the pure metal see the [copper profile](/profiles/copper/).
best_for: Heavily loaded, low-speed bearings, worm gears and valve parts, and marine hardware in seawater (Concast, Bunting, Wikipedia)
weakest_at: Dealuminification in seawater crevices, under deposits or with galvanic coupling, and oxyacetylene welding (not recommended by Concast)
identity:
  formula: 'Cu-Al-Fe casting alloy, UNS C95400: copper 83.00 min, aluminium 10.00 to 11.50, iron 3.00 to 5.00, nickel 1.50 max (includes cobalt), manganese 0.50 max (wt %, ASTM B505 limits as printed)'
  source: concast-c95400
  where: Chemical composition table, ASTM B505/B505M-23; the CDA cast-bronze table (row C95400), the Aviva page and the Bunting page print the same ranges
  designations:
    - system: Name
      code: C95400 Aluminum Bronze
      note: C954
    - system: Name
      code: Aluminum Bronze 9C
    - system: Name
      code: 9C
    - system: CDA
      code: '954'
    - system: UNS
      code: C95400
    - system: ASTM
      code: B505
    - system: ASTM
      code: B148
    - system: ASTM
      code: B271
    - system: ASTM
      code: B-763
    - system: Name
      code: SB-148 Grade C
    - system: SAE
      code: J461
    - system: SAE
      code: J462
    - system: SAE
      code: 68A
    - system: Name
      code: CA954
    - system: AMS
      code: '4870'
    - system: AMS
      code: '4871'
    - system: AMS
      code: '4635'
    - system: Name
      code: QQ-C-390, G5
    - system: MIL
      code: B-16033
    - system: MIL
      code: Class 3
    - system: Name
      code: Aluminium Bronzes
      note: CDA group C95000-C95999
tags:
  environments: []
  stresses: []
  applications:
    - mechanisms
    - structures
properties:
  - benchmark: density
    label: Density, C95400 (Concast)
    value: 7.45
    unit: g/cm3
    scope: material
    conditions:
      grade: C95400 (standard continuous-cast sheet)
      temperature: 20 °C
      unit_in_source: 0.269 lb/in3 at 68 °F (US column)
    method: Value printed in the metric column of a manufacturer's physical properties table
    status: ground
    source: concast-c95400
    where: Physical properties table, Density row, metric column
  - benchmark: melting_point
    label: Solidus, C95400 (Concast)
    value: 1027
    unit: °C
    scope: material
    conditions:
      grade: C95400
      unit_in_source: 1880 °F
      pressure: not stated
    method: Value printed in the metric column of a manufacturer's physical properties table
    status: ground
    source: concast-c95400
    where: Physical properties table, Melting point solidus row, metric column
  - benchmark: melting_point
    label: Liquidus, C95400 (Concast)
    value: 1038
    unit: °C
    scope: material
    conditions:
      grade: C95400
      unit_in_source: 1900 °F
      pressure: not stated
    method: Value printed in the metric column of a manufacturer's physical properties table
    status: ground
    source: concast-c95400
    where: Physical properties table, Melting point liquidus row, metric column
  - benchmark: thermal_conductivity
    label: Thermal conductivity at 20 °C, C95400 (Aviva)
    value: 58.7
    unit: W/(m·K)
    scope: material
    conditions:
      grade: C95400
      temperature: 20 °C
      unit_in_source: 33.9 Btu·ft/(hr·ft²·°F) at 68 °F (US column)
    method: Value printed in the metric column of a supplier's physical properties table; the metric unit is printed as W/m·K
    status: ground
    source: aviva-c95400
    where: Physical Properties table, Thermal Conductivity row, metric column
  - benchmark: cte
    label: Coefficient of thermal expansion, 20 to 300 °C (Aviva)
    value: 16.2
    unit: ppm/K
    scope: material
    conditions:
      grade: C95400
      temperature: 20 to 300 °C
      unit_in_source: 16.2 × 10^-6 per °C (20 to 300 °C)
      us_column: 9.0 × 10^-6 per °F (68 to 572 °F)
    method: Metric value printed in a supplier's physical properties table; 10^-6 per K is the same unit as ppm/K, so the number is copied without conversion
    status: ground
    note: Concast prints 15.5 for the same range (next row); the two sources disagree.
    source: aviva-c95400
    where: Physical Properties table, Coefficient of Thermal Expansion row, metric column
  - benchmark: cte
    label: Coefficient of thermal expansion, 20 to 300 °C (Concast)
    value: 15.5
    unit: ppm/K
    scope: material
    conditions:
      grade: C95400
      temperature: 20 to 300 °C
      unit_in_source: 15.5 × 10^-6 per °C (20 to 300 °C)
      us_column: 9 × 10^-6 per °F (68 to 572 °F)
    method: Metric value printed in a manufacturer's physical properties table; the same sheet's US value converts to about 16.2, so the two columns disagree
    status: ground
    note: Aviva prints 16.2 for the same range (previous row).
    source: concast-c95400
    where: Physical properties table, Coefficient of thermal expansion row, metric column
  - benchmark: electrical_conductivity
    label: Electrical conductivity, C95400 (Concast)
    value: 13
    unit: '%IACS'
    scope: material
    conditions:
      grade: C95400
      temperature: 68 °F (20 °C)
      unit_in_source: 13% IACS at 68 °F
    method: Value printed in the US column of a manufacturer's physical properties table; electrical_conductivity is a snake_case name because it is not in the property canon
    status: ground
    source: concast-c95400
    where: Physical properties table, Electrical conductivity row
  - benchmark: electrical_resistivity
    label: Electrical resistivity, C95400 (Aviva)
    value: 13.33
    unit: µΩ·cm
    scope: material
    conditions:
      grade: C95400
      temperature: 20 °C
      unit_in_source: 80.2 ohms-cmil/ft at 68 °F (US column)
    method: Value printed in the metric column of a supplier's physical properties table
    status: ground
    source: aviva-c95400
    where: Physical Properties table, Electrical Resistivity row, metric column
  - benchmark: specific_heat
    label: Specific heat capacity, C95400 (Aviva)
    value: 419
    unit: J/(kg·K)
    scope: material
    conditions:
      grade: C95400
      temperature: 293 K (20 °C)
      unit_in_source: 0.1 Btu/lb/°F at 68 °F (US column)
    method: Value printed in the metric column of a supplier's physical properties table
    status: ground
    source: aviva-c95400
    where: Physical Properties table, Specific Heat Capacity row, metric column
  - benchmark: elastic_modulus
    label: Modulus of elasticity in tension, C95400 (Concast)
    value: 107000
    unit: MPa
    scope: material
    conditions:
      grade: C95400
      temperature: not stated
      unit_in_source: 15500 ksi (US column)
    method: Value printed in the metric column of a manufacturer's physical properties table; the row label is printed as Modulas
    status: ground
    source: concast-c95400
    where: Physical properties table, Modulus of elasticity in tension row, metric column
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, continuous cast C95400, as cast (minimum)
    value: 586
    bound: lower
    unit: MPa
    scope: material
    conditions:
      grade: C95400 (ASTM B505/B505M-23)
      casting_method: continuous cast, standard sheet
      heat_treatment: as cast (standard sheet; the heat-treated grade has its own sheet, C95400HT)
      measure: minimum
      unit_in_source: 85 ksi
    method: Minimum value printed in a manufacturer's mechanical properties table, metric column
    status: ground
    source: concast-c95400
    where: Mechanical properties table, Tensile strength min, MPa column
  - benchmark: yield_strength
    label: Yield strength, continuous cast C95400, as cast (minimum, 0.5 % extension under load)
    value: 221
    bound: lower
    unit: MPa
    scope: material
    conditions:
      grade: C95400 (ASTM B505/B505M-23)
      casting_method: continuous cast, standard sheet
      heat_treatment: as cast (standard sheet; the heat-treated grade has its own sheet, C95400HT)
      measure: minimum, 0.5 % extension under load
      unit_in_source: 32 ksi
    method: Minimum value printed in a manufacturer's mechanical properties table, metric column; the yield definition is 0.5 % extension under load
    status: ground
    source: concast-c95400
    where: Mechanical properties table, Yield strength at 0.5% extension under load min, MPa column
  - benchmark: elongation
    label: Elongation, continuous cast C95400, as cast (minimum)
    value: 12
    bound: lower
    unit: '%'
    scope: material
    conditions:
      grade: C95400 (ASTM B505/B505M-23)
      casting_method: continuous cast, standard sheet
      heat_treatment: as cast (standard sheet; the heat-treated grade has its own sheet, C95400HT)
      gauge_length: 2 in or 50 mm
    method: Minimum value printed in a manufacturer's mechanical properties table
    status: ground
    source: concast-c95400
    where: Mechanical properties table, Elongation in 2 in or 50 mm min column
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, continuous cast solid bar, as cast (minimum), US units
    value: 85000
    bound: lower
    unit: psi
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: as cast
      measure: minimum
      caveat: typical properties, not for specification (supplier note)
    method: Minimum value printed in a supplier's typical properties block, continuous cast, as cast
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Physical Properties, Continuous Cast, As Cast, Tensile Strength PSI 85,000 min
  - benchmark: yield_strength
    label: Yield strength, continuous cast solid bar, as cast (minimum), US units
    value: 32000
    bound: lower
    unit: psi
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: as cast
      measure: minimum
      caveat: typical properties, not for specification (supplier note)
    method: Minimum value printed in a supplier's typical properties block, continuous cast, as cast
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Physical Properties, Continuous Cast, As Cast, Yield Strength PSI 32,000 min
  - benchmark: elongation
    label: Elongation, continuous cast solid bar, as cast (minimum)
    value: 12
    bound: lower
    unit: '%'
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: as cast
      caveat: typical properties, not for specification (supplier note)
    method: Minimum value printed in a supplier's typical properties block, continuous cast, as cast
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Physical Properties, Continuous Cast, As Cast, Elongation 12% min
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, continuous cast C95400HT, heat treated (minimum)
    value: 655
    bound: lower
    unit: MPa
    scope: material
    conditions:
      grade: C95400HT (ASTM B505/B505M-23)
      casting_method: continuous cast
      heat_treatment: heat treated (C95400HT sheet)
      measure: minimum
      unit_in_source: 95 ksi
    method: Minimum value printed in a manufacturer's mechanical properties table, metric column; the remarks column reads Heat treated
    status: ground
    source: concast-c95400ht
    where: Mechanical properties table, row 95 ksi / 655 MPa, Tensile strength min
  - benchmark: yield_strength
    label: Yield strength, continuous cast C95400HT, heat treated (minimum, 0.5 % extension under load)
    value: 310
    bound: lower
    unit: MPa
    scope: material
    conditions:
      grade: C95400HT (ASTM B505/B505M-23)
      casting_method: continuous cast
      heat_treatment: heat treated (C95400HT sheet)
      measure: minimum, 0.5 % extension under load
      unit_in_source: 45 ksi
    method: Minimum value printed in a manufacturer's mechanical properties table, metric column
    status: ground
    source: concast-c95400ht
    where: Mechanical properties table, row 45 ksi / 310 MPa, Yield strength at 0.5% extension under load min
  - benchmark: elongation
    label: Elongation, continuous cast C95400HT, heat treated (minimum)
    value: 10
    bound: lower
    unit: '%'
    scope: material
    conditions:
      grade: C95400HT (ASTM B505/B505M-23)
      casting_method: continuous cast
      heat_treatment: heat treated (C95400HT sheet)
      gauge_length: 2 in or 50 mm
    method: Minimum value printed in a manufacturer's mechanical properties table
    status: ground
    source: concast-c95400ht
    where: Mechanical properties table, row 10 %, Elongation in 2 in or 50 mm min
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, continuous cast solid bar, heat treated (minimum), US units
    value: 95000
    bound: lower
    unit: psi
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: heat treated
      measure: minimum
      caveat: typical properties, not for specification (supplier note)
    method: Minimum value printed in a supplier's typical properties block, continuous cast, heat treated
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Physical Properties, Continuous Cast, Heat Treated, Tensile Strength PSI 95,000 min
  - benchmark: yield_strength
    label: Yield strength, continuous cast solid bar, heat treated (minimum), US units
    value: 45000
    bound: lower
    unit: psi
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: heat treated
      measure: minimum
      caveat: typical properties, not for specification (supplier note)
    method: Minimum value printed in a supplier's typical properties block, continuous cast, heat treated
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Physical Properties, Continuous Cast, Heat Treated, Yield Strength PSI 45,000 min
  - benchmark: elongation
    label: Elongation, continuous cast solid bar, heat treated (minimum)
    value: 10
    bound: lower
    unit: '%'
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: heat treated
      caveat: typical properties, not for specification (supplier note)
    method: Minimum value printed in a supplier's typical properties block, continuous cast, heat treated
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Physical Properties, Continuous Cast, Heat Treated, Elongation 10% min
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, sand casting to ASTM B148 (minimum)
    value: 515
    bound: lower
    unit: MPa
    scope: material
    conditions:
      grade: C95400 (ASTM B148 sand casting)
      casting_method: sand casting (ASTM B148)
      heat_treatment: as cast or solution annealed or normalized (the sheet's heat-treatment column; minimums not split by route)
      measure: minimum
      caveat: reference values on a casting vendor's sheet; the vendor disclaims them
    method: Minimum value printed on a casting vendor's ASTM B148 data sheet
    status: ground
    source: icast-b148
    where: Mechanical Properties block, Tensile Strength in Mpa 515 min
  - benchmark: yield_strength
    label: Yield strength, sand casting to ASTM B148 (minimum)
    value: 205
    bound: lower
    unit: MPa
    scope: material
    conditions:
      grade: C95400 (ASTM B148 sand casting)
      casting_method: sand casting (ASTM B148)
      heat_treatment: as cast or solution annealed or normalized (the sheet's heat-treatment column; minimums not split by route)
      measure: minimum
      caveat: reference values on a casting vendor's sheet; the vendor disclaims them
    method: Minimum value printed on a casting vendor's ASTM B148 data sheet
    status: ground
    source: icast-b148
    where: Mechanical Properties block, Yield Strength in Mpa 205 min
  - benchmark: elongation
    label: Elongation, sand casting to ASTM B148 (minimum)
    value: 12
    bound: lower
    unit: '%'
    scope: material
    conditions:
      grade: C95400 (ASTM B148 sand casting)
      casting_method: sand casting (ASTM B148)
      heat_treatment: as cast or solution annealed or normalized (the sheet's heat-treatment column; minimums not split by route)
      caveat: reference values on a casting vendor's sheet; the vendor disclaims them
    method: Minimum value printed on a casting vendor's ASTM B148 data sheet
    status: ground
    source: icast-b148
    where: Mechanical Properties block, Elongation in % 12 min
  - benchmark: hardness_brinell
    label: Hardness, sand casting to ASTM B148 (minimum)
    value: 150
    bound: lower
    unit: BHN
    scope: material
    conditions:
      grade: C95400 (ASTM B148 sand casting)
      casting_method: sand casting (ASTM B148)
      heat_treatment: as cast or solution annealed or normalized (the sheet's heat-treatment column; minimums not split by route)
      caveat: reference values on a casting vendor's sheet; the vendor disclaims them
    method: Minimum value printed on a casting vendor's ASTM B148 data sheet; the name hardness_brinell is snake_case because it is not in the property canon
    status: ground
    source: icast-b148
    where: Mechanical Properties block, Hardness in BHN 150 min
  - benchmark: hardness_brinell
    label: Brinell hardness, continuous cast solid bar, as cast (3000 kg load)
    value: 170
    unit: BHN
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: as cast
      load: 3000 kg
      caveat: typical properties, not for specification (supplier note)
    method: Value printed in a supplier's typical properties block; the name hardness_brinell is snake_case because it is not in the property canon
    status: ground
    source: bunting-c95400
    where: 'Typical Properties block, Brinell Hardness (3000 kg load; As Cast): 170'
  - benchmark: hardness_brinell
    label: Brinell hardness, continuous cast solid bar, heat treated (3000 kg load)
    value: 195
    unit: BHN
    scope: material
    conditions:
      grade: C95400
      casting_method: continuous cast solid bar
      heat_treatment: heat treated
      load: 3000 kg
      caveat: typical properties, not for specification (supplier note)
    method: Value printed in a supplier's typical properties block; the name hardness_brinell is snake_case because it is not in the property canon
    status: ground
    source: bunting-c95400
    where: 'Typical Properties block, Brinell Hardness (3000 kg load; Heat Treated): 195'
  - benchmark: machinability_rating
    label: Machinability rating, C95400 (supplier index)
    value: 60
    unit: '-'
    scope: material
    conditions:
      grade: C95400
      basis: relative index as printed; the sheet does not print the reference alloy
    method: Index printed in a manufacturer's machinability table; the name machinability_rating is snake_case because it is not in the property canon
    status: ground
    source: concast-c95400
    where: Machinability table, Copper alloy UNS no. C95400, Machinability rating 60
  - benchmark: max_service_temp
    label: Maximum operating temperature, bar product (intermittent)
    value: 750
    bound: upper
    unit: °F
    scope: material
    conditions:
      grade: C95400
      note_in_source: intermittent to 1200 °F
      basis: service limit printed for the bar product
    method: Maximum operating temperature printed in a supplier's typical properties block
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Maximum Operating Temperature row
  - benchmark: min_service_temp
    label: Minimum operating temperature, bar product
    value: -450
    unit: °F
    scope: material
    conditions:
      grade: C95400
      basis: service limit printed for the bar product
    method: Minimum operating temperature printed in a supplier's typical properties block
    status: ground
    source: bunting-c95400
    where: Typical Properties block, Minimum Operating Temperature row
corrosion:
  - environment: Sea water, free exposure (general corrosion)
    headline: Hendrix says general corrosion in sea water is too small to cause significant damage to non-ferrous alloys in normal use.
    effect: Hendrix says the metal removed by general corrosion in sea water or fresh water is insufficient to cause significant damage to any non-ferrous metal or alloy in normal commercial use. It also says aluminium bronzes free from gamma-2 phase show no selective phase corrosion under free exposure in fresh or sea water. No measured corrosion rate for C95400 was read.
    rating: low
    conditions:
      basis: qualitative statements for non-ferrous alloys and for aluminium bronzes (Hendrix); no C95400 rate in the pages read
      test: not stated
    source: hgh-al-bronze
    where: Section (i) Uniform or General Corrosion; Section (iv) Selective Phase Attack, free exposure paragraph
  - environment: Sea water with sulphide pollution (pitting)
    headline: Sulphide pollution of sea water may pit aluminium bronzes, although copper alloys do not normally pit in sea water.
    effect: Hendrix says pitting in copper alloys is not directly associated with chloride content, and copper alloys do not normally show significant pitting in sea water service. Sulphide pollution of sea water may cause pitting in most copper alloys, including aluminium bronzes; for polluted waters it names copper alloys containing tin as usually best.
    rating: unknown
    conditions:
      basis: qualitative; the source gives no depth, rate, test time or rating
      pollutant: sulphide
    source: hgh-al-bronze
    where: Section (ii) Pitting
  - environment: 'Dealuminification: sea water or fresh water under crevices, deposits, marine growth, or galvanic or electrical-leakage coupling'
    headline: Dealuminification is the selective loss of aluminium from aluminium bronze, and it can be largely prevented with an alloy free of gamma-2 phase.
    effect: Hendrix says dealuminification is selective phase attack in aluminium bronzes. It describes dealloying as leaving a porous, very low strength copper residue that keeps the shape of the part, which makes the depth hard to judge without metallographic sections. Under free exposure in fresh or sea water, gamma-2-free aluminium bronzes show no selective phase corrosion, but crevices, deposits, marine growth, galvanic corrosion or electrical leakage can cause it. Hendrix calls selective phase attack, of which dealuminification is a form, not usually of great significance, and says it occurs only under particular severe service conditions.
    rating: low
    conditions:
      basis: 'Hendrix wording: ''not usually of great significance''; no depth or rate for C95400 in the pages read'
      gamma2_phase: C95400 gamma-2 status not stated in the pages read
    source: hgh-al-bronze
    where: Section (iv) Selective Phase Attack and Section (v) Dealloying
risks:
  hazards:
    - text: 'Copper dust, spray or crystals: the CDC ToxFAQ says breathing copper dusts, sprays or crystals can irritate the nose and throat and cause dizziness and headaches. It also says the U.S. DHHS, EPA and IARC have not evaluated copper for cancer.'
      ghs: []
      source: atsdr-copper
      where: ToxFAQs sections How can copper affect my health? and Can copper cause cancer?
    - text: 'Nickel and lead: the composition has up to 1.50 % nickel including cobalt (ASTM B505 limits on the Concast sheet). Bunting''s warning for its C95400 bars says the product can expose you to nickel, lead and tetrafluoroethylene, which California lists as causing cancer, and to nickel and lead, which California lists as causing birth defects or other reproductive harm.'
      ghs: []
      source: bunting-c95400
      where: Warning paragraph after the typical properties
  failure_risks:
    - mode: Dealuminification of two-phase aluminium bronze
      trigger: Sea water or fresh water in crevices, under deposits or marine growth, or with galvanic or electrical-leakage coupling; Hendrix ties the risk to gamma-2 phase in the alloy
      consequence: Selective removal of aluminium leaves a porous, weak copper residue that keeps the shape of the part. Hendrix says the depth is very hard to judge except by sectioning. Severity is our judgement from the Hendrix wording, which calls selective phase attack not usually of great significance but possible under crevice and galvanic conditions.
      severity: moderate
      source: hgh-al-bronze
      where: Section (iv) Selective Phase Attack and Section (v) Dealloying
    - mode: Stress corrosion cracking in ammonia
      trigger: Tensile stress from working, welding or assembly, together with ammonia or an ammonia-like atmosphere
      consequence: Hendrix says stress corrosion cracking of aluminium bronzes in ammonia follows a transgranular path. It rates aluminium bronzes much superior to brasses, though not as good as copper-nickel.
      severity: low
      source: hgh-al-bronze
      where: Section (viii) Stress Corrosion
    - mode: Pitting in sulphide-polluted sea water
      trigger: Sulphide pollution of sea water
      consequence: Hendrix says pitting is important because it can perforate a valve, pump casting or water tube in a relatively short time. The source gives no depth or rate for C95400.
      severity: moderate
      source: hgh-al-bronze
      where: Section (ii) Pitting
  side_effects:
    - text: 'Copper pick-up: in some aggressive waters, pure copper and some high-copper alloys can put enough copper into water to increase corrosion of galvanized steel or aluminium alloys downstream. Hendrix says aluminium bronzes are virtually unaffected by cupro-solvent waters and show no copper pick-up problems.'
      affects: Galvanized steel and aluminium alloys downstream of the component
      source: hgh-al-bronze
      where: Section (i) Uniform or General Corrosion, first paragraph
  handling:
    - text: 'Specify the condition on the order: continuous-cast as cast gives 586 MPa minimum tensile and 12 % minimum elongation; the heat-treated C95400HT gives 655 MPa and 10 %.'
      source: concast-c95400
      where: Mechanical properties tables (ASTM B505/B505M-23) for C95400 and C95400HT
    - text: Bearings need hardened steel shafts and constant lubrication with grease, graphite or molybdenum disulfide, according to Bunting.
      source: bunting-c95400
      where: Item description paragraph
    - text: Oxyacetylene welding is not recommended. Gas shielded arc welding and coated metal arc welding are rated good.
      source: concast-c95400
      where: Fabrication properties table
    - text: If you work with copper, wear the necessary protective clothing and equipment, follow safety procedures, and shower and change clothes before going home, according to the CDC.
      source: atsdr-copper
      where: How can I protect my family from copper exposure?
  mitigations:
    - text: Keep the alloy free from gamma-2 phase by controlling its composition and cooling rate. Hendrix says this very largely prevents dealuminification under most conditions of service.
      source: hgh-al-bronze
      where: Section (iv) Selective Phase Attack and Section (v) Dealloying
    - text: Stress-relieve parts after working or welding, and keep assembly stresses low, to reduce the risk of stress corrosion cracking, according to Hendrix.
      source: hgh-al-bronze
      where: Section (viii) Stress Corrosion
    - text: Where service stresses are high, the low susceptibility of aluminium bronzes to stress corrosion matters, and Hendrix says it is especially low for nickel aluminium bronzes, which are a different alloy.
      source: hgh-al-bronze
      where: Section (viii) Stress Corrosion
uses:
  - application: mechanisms
    device: Bearings, bushings, spur gears and heavily loaded worm gears
    example: Concast lists bearing segments for the steel industry, bearings, bushings, gears, heavily loaded worm gears and spur gears among the typical uses of C95400.
    source: concast-c95400
    where: Typical uses list, Industrial entry
  - application: structures
    device: Covers for marine hardware and ship building parts
    example: Concast lists covers for marine hardware and ship building among the typical uses of C95400. The application slug is our mapping of this marine use.
    source: concast-c95400
    where: Typical uses list, Marine entry
  - application: mechanisms
    device: Pump parts, valve bodies, valve guides, valve seats and valves
    example: Concast lists pump parts, valve bodies, valve guides, valve seats and valves among the typical uses of C95400.
    source: concast-c95400
    where: Typical uses list, Industrial entry
supply:
  - subject: Copper (mine production, copper content, 2025e), the matrix of the alloy at 83.00 % minimum
    producers:
      - country: Chile
        share_percent: 23
        year: 2025
      - country: Congo (Kinshasa)
        share_percent: 13.9
        year: 2025
      - country: Peru
        share_percent: 11.7
        year: 2025
      - country: China
        share_percent: 7.8
        year: 2025
      - country: Russia
        share_percent: 5.7
        year: 2025
    critical_lists:
      - list: U.S. Final 2025 List of Critical Minerals (copper added, per the USGS copper summary)
        listed: true
    recycling: 'USGS: brass and wire-rod mills accounted for about 80 % of the copper recovered from scrap, and copper recovered from scrap contributed about 30 % of U.S. copper supply.'
    substitutes:
      - 'USGS: aluminum, optical fiber and plastics substitute for copper in some uses, and titanium and steel are used in heat exchangers. The summary does not mention bronze.'
    source: usgs-copper-mcs2026
    where: World Mine and Refinery Production and Reserves table, mine production 2025e (world total 23,000 thousand t; shares calculated by Space Mushroom from the printed values 5,300, 3,200, 2,700, 1,800 and 1,300); Critical minerals paragraph; Recycling; Substitutes
  - subject: Aluminium (primary smelter production, 2025e), the main alloying element at 10.00 to 11.50 %
    abundance: 'USGS: global bauxite resources are estimated at 55 billion to 75 billion tons'
    producers:
      - country: China
        share_percent: 60.8
        year: 2025
      - country: India
        share_percent: 5.7
        year: 2025
      - country: Russia
        share_percent: 5.3
        year: 2025
      - country: Canada
        share_percent: 4.5
        year: 2025
      - country: United Arab Emirates
        share_percent: 3.6
        year: 2025
    critical_lists: []
    recycling: 'USGS: aluminum recovered from purchased scrap in the United States was about 3.6 million tons in 2025, and aluminum recovered from old scrap was equivalent to about 28 % of apparent consumption.'
    substitutes:
      - 'USGS: composites, magnesium, steel and titanium can substitute for aluminum in some ground transportation uses. The summary does not mention bronze.'
    source: usgs-aluminum-mcs2026
    where: World Smelter Production and Capacity table, smelter production 2025e (world total 74,000 thousand t; shares calculated by Space Mushroom from the printed values 45,000, 4,200, 3,900, 3,300 and 2,700); Recycling; Substitutes; World Resources
documents:
  - title: 'Wieland Concast: C95400 aluminum bronze, continuous cast datasheet (standard stock, ASTM B505)'
    type: datasheet
    url: https://www.concast.com/files/C95400.pdf
  - title: 'Wieland Concast: C95400HT heat-treated aluminum bronze datasheet'
    type: datasheet
    url: https://www.concast.com/files/C95400HT.pdf
  - title: 'Aviva Metals: C95400 Aluminum Bronze (C954), product page with standards, uses and physical properties'
    type: datasheet
    url: https://avivametals.com/products/c95400-aluminum-bronze-9c
  - title: 'Bunting Bearings: C95400 continuous cast aluminum bronze solid bar item page (typical properties)'
    type: datasheet
    url: https://catalog.buntingbearings.com/sl/printitem/-font-color-black-continuous-cast-solid-bars-font-/-font-color-black-c95400-font-aluminum-bronze-bars/b954s000022
  - title: 'iCast Alloys: ASTM B148 Aluminum Bronze UNS C95400 data sheet'
    type: datasheet
    url: https://icastllp.com/material_db_pdf/ASTM%20B148%20Aluminum%20Bronze%20UNS%20C95400.pdf
  - title: 'Copper Development Association: Standard Designation for Cast Copper Alloys (application datasheet, revised 13 May 2026)'
    type: datasheet
    url: https://datasheets.copper.org/cast-bronzes.pdf
    year: 2026
  - title: 'The Hendrix Group archive: aluminium bronze, 3 corrosion types'
    type: report
    url: https://hghouston.com/archive/material-property-data/copper-and-copper-alloys/aluminum-bronze/3-corrosion-types
  - title: 'Wikipedia: Aluminium bronze (seawater resistance, marine applications, alloy designations)'
    type: database
    url: https://en.wikipedia.org/wiki/Aluminium_bronze
    year: 2026
  - title: 'ATSDR ToxFAQs: Copper (U.S. CDC)'
    type: report
    url: https://wwwn.cdc.gov/tsp/ToxFAQs/ToxFAQsDetails.aspx?faqid=205&toxid=37
  - title: 'USGS Mineral Commodity Summaries 2026: Copper'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-copper.pdf
    year: 2026
  - title: 'USGS Mineral Commodity Summaries 2026: Aluminum'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
    year: 2026
gaps:
  - Seawater corrosion rate for C95400 was not found in any page we could open. The copper.org marine pages returned by search were blocked or cover nickel aluminium bronze (C95800), so they are not used. A forum estimate seen in search results is not used.
  - Dealuminification has no depth, rate or test time for C95400 in the pages read. Hendrix does not say whether C95400 forms gamma-2 phase, and the composition at which gamma-2 forms is not printed on the pages read.
  - The Pumps and Systems article on dealloying in service-water pumps redirected to a viewer, and the Corrosionpedia dealuminization page returned an error. Neither is used.
  - Aviva's mechanical-property table could not be read cell by cell in the extracted text (its sand-cast and centrifugal rows shift columns), so those rows are not used. No shear, fatigue or impact strength for C95400 is recorded.
  - 'The coefficient of thermal expansion disagrees between sources: Concast prints 15.5 ppm/K for 20 to 300 °C, while its own U.S. value (9 × 10^-6 per °F) converts to about 16.2, and Aviva prints 16.2. Both are kept, each with its source.'
  - 'Electrical conductivity: Aviva prints 0.75 MegaSiemens/cm at 20 °C, which does not agree with its own 13 %IACS; Concast prints 0.075, which does. Only the %IACS value is recorded.'
  - 'Two metric units are printed wrongly on the Concast sheet: thermal conductivity as W/m and specific heat as J/kg. The Aviva page prints W/m·K and J/kg·K, so Aviva values are used for those two properties.'
  - Sand-cast minimums (515 MPa, 205 MPa, 12 %, 150 BHN) come from the iCast ASTM B148 sheet, which disclaims them as reference only and gives one heat-treatment column for as cast, solution annealed or normalized. The ASTM B148 text itself was not opened.
  - Bunting's typical properties are marked not to be used for specification. Concast's ASTM B505 minimums are the closer basis; both are kept with their own conditions.
  - The standard Concast sheet does not print 'as cast' beside its mechanical row; it is read as the as-cast grade because the heat-treated grade has its own sheet, C95400HT.
  - 'Hardness: Concast prints typical hardness of 170 as cast and 177 heat treated at 500 kg. These are not recorded because Bunting''s values are at 3000 kg, and the name hardness_brinell is not in the property canon.'
  - 'Lead: the Concast composition table has no lead line, but Bunting''s California warning for its C95400 bars lists lead. The lead limit of this alloy is not settled by the sources read.'
  - SAE 68A is printed on the Aviva page for C95400. A 2013 National Bronze table, seen only in search results, pairs 68A with C95200; it was not opened, so the 68A match rests on one page.
  - 'Aluminium''s status on the U.S. 2025 critical-minerals list is not stated: the USGS aluminum summary does not mention the list, and the USGS list page returned a 403 block. Copper is listed, per the USGS copper summary.'
  - Machinability 60 is a supplier index with no reference alloy printed. The name machinability_rating is not in the property canon.
  - No CAS number, crystal system or space group was read for the alloy, and no GHS classification. Hazard data rest on the CDC ToxFAQ for copper and on Bunting's Prop 65 warning.
  - No space-environment data (vacuum, outgassing, radiation or atomic oxygen) for C95400 were read, so tags.environments is empty.
  - 'Supply shares are calculated by Space Mushroom from the printed USGS values: copper 2025e mine production, world total 23,000 thousand t; aluminium 2025e smelter production, world total 74,000 thousand t. Neither USGS summary mentions bronze.'
  - No Poisson's ratio or fatigue strength was found in the pages read. No media were added; no image was fetched or checked.
sources:
  concast-c95400:
    title: Wieland Concast, C95400 aluminum bronze, continuous cast datasheet (standard stock; composition, mechanical, physical, machinability, fabrication, typical uses)
    url: https://www.concast.com/files/C95400.pdf
    kind: datasheet
    license: Manufacturer datasheet (cited, not reproduced)
  concast-c95400ht:
    title: Wieland Concast, C95400HT heat-treated aluminum bronze datasheet (mechanical properties, machinability)
    url: https://www.concast.com/files/C95400HT.pdf
    kind: datasheet
    license: Manufacturer datasheet (cited, not reproduced)
  aviva-c95400:
    title: Aviva Metals, C95400 Aluminum Bronze (C954), product page (standards, typical uses, physical properties)
    url: https://avivametals.com/products/c95400-aluminum-bronze-9c
    kind: datasheet
    license: Supplier web page (cited, not reproduced)
  bunting-c95400:
    title: Bunting Bearings, C95400 continuous cast aluminum bronze solid bar item page (typical properties, not for specification)
    url: https://catalog.buntingbearings.com/sl/printitem/-font-color-black-continuous-cast-solid-bars-font-/-font-color-black-c95400-font-aluminum-bronze-bars/b954s000022
    kind: datasheet
    license: Supplier web page (cited, not reproduced)
  icast-b148:
    title: iCast Alloys, ASTM B148 Aluminum Bronze UNS C95400 data sheet (sand castings; reference only)
    url: https://icastllp.com/material_db_pdf/ASTM%20B148%20Aluminum%20Bronze%20UNS%20C95400.pdf
    kind: datasheet
    license: Supplier data sheet (cited, not reproduced)
  cda-cast-bronzes:
    title: Copper Development Association, Standard Designation for Cast Copper Alloys (application datasheet, revised 13 May 2026; C95400 composition row)
    url: https://datasheets.copper.org/cast-bronzes.pdf
    year: 2026
    kind: datasheet
    license: Copper Development Association (cited, not reproduced)
  hgh-al-bronze:
    title: 'The Hendrix Group, Material Property Data: aluminium bronze, corrosion types (uniform, pitting, selective phase attack, dealloying, stress corrosion, galvanic)'
    url: https://hghouston.com/archive/material-property-data/copper-and-copper-alloys/aluminum-bronze/3-corrosion-types
    kind: web
    license: Technical archive page (cited, not reproduced)
  wiki-aluminium-bronze:
    title: 'Aluminium bronze (Wikipedia): seawater resistance, marine applications, alloy composition table'
    url: https://en.wikipedia.org/wiki/Aluminium_bronze
    year: 2026
    kind: web
    license: CC BY-SA 4.0 (cited, not reproduced)
  atsdr-copper:
    title: 'ATSDR ToxFAQs: Copper (Agency for Toxic Substances and Disease Registry, U.S. CDC)'
    url: https://wwwn.cdc.gov/tsp/ToxFAQs/ToxFAQsDetails.aspx?faqid=205&toxid=37
    kind: report
    license: U.S. government public domain (cited, not reproduced)
  usgs-copper-mcs2026:
    title: 'Mineral Commodity Summaries 2026: Copper'
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-copper.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-aluminum-mcs2026:
    title: 'Mineral Commodity Summaries 2026: Aluminum'
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
license: CC-BY-4.0
updated: '2026-10-24'
media: []
review:
  status: draft
  method: assistant
  checked_values: 31
  unreachable: 0
  caveats: 14
  note: 'Values read by an AI assistant on 2026-10-24 from pages fetched in this run: the Concast C95400 and C95400HT sheets, the Aviva product page, the Bunting item page, the iCast ASTM B148 sheet, the CDA cast-bronze datasheet, the Hendrix corrosion page, Wikipedia, the CDC ToxFAQ for copper, and the USGS MCS 2026 copper and aluminum summaries. Blocked or not used: MakeItFrom (blocked), the PACE metallographic.com materials database (taken offline), the USGS 2025 critical-list page (403), Corrosionpedia (error), the Pumps and Systems article (viewer redirect), and copper.org marine pages (nickel aluminium bronze only). Caveats: the CTE disagrees between Concast and Aviva; the iCast and Bunting values carry the source''s own reference or not-for-specification notes.'
story:
  why: Aluminium bronze C95400 is a copper alloy in which aluminium is the main alloying element. Aviva calls it the most popular all-purpose aluminium bronze, with high yield and tensile strength, good ductility, and exceptional resistance to wear, fatigue and deformation under shock or overload. Bunting says its physical properties stay good at elevated temperature and that it suits heavily loaded bearings. Concast lists marine hardware and ship building among its uses. Wikipedia says the aluminium forms a tough surface layer that protects the copper-rich alloy, and that aluminium bronzes resist corrosion in sea water.
  risk_groups:
    - title: For people
      lead: The alloy contains nickel, and Bunting's catalogue carries a California warning that names nickel and lead. Copper dust irritates the airways.
      level: 1
      verdict: Warning on nickel and lead
      points:
        - label: Nickel
          line: C95400 contains up to 1.50 % nickel, including cobalt (ASTM B505 limits on the Concast sheet). Bunting's warning says the product can expose you to nickel, lead and tetrafluoroethylene, which California lists as causing cancer, and to nickel and lead, which California lists as causing birth defects or other reproductive harm.
        - label: Lead
          line: Bunting calls C95400 a non-lead alloy, and the Concast composition table has no lead line. The same Bunting warning lists lead, so these sources do not settle the lead content.
        - label: Copper dust
          line: The CDC says breathing copper dusts, sprays or crystals can irritate the nose and throat and cause dizziness and headaches. The U.S. DHHS, EPA and IARC have not evaluated copper for cancer.
    - title: If it fails
      lead: 'The failure routes in these sources are chemical: dealuminification in sea water, pitting in polluted sea water, and cracking in ammonia.'
      level: 2
      verdict: Chemical attack in seawater
      points:
        - label: Dealuminification
          line: In sea water, crevices, deposits, marine growth or galvanic coupling can remove aluminium selectively, leaving a porous copper residue that is weak. Hendrix says selective phase attack, of which this is a form, is not usually of great significance and occurs only under particular severe conditions.
        - label: Sulphide pollution
          line: Sulphide-polluted sea water may pit aluminium bronzes. Hendrix says pitting can perforate a valve, pump casting or water tube in a relatively short time.
        - label: Ammonia
          line: Hendrix says aluminium bronzes can crack in ammonia under tensile stress, along a transgranular path, and that they resist this much better than brasses.
    - title: Handling and storage
      points:
        - label: Pick the condition
          line: As cast, continuous-cast C95400 gives 586 MPa minimum tensile strength and 12 % elongation. Heat treated, C95400HT gives 655 MPa and 10 %. Bunting says the bar is available either way.
        - label: Welding
          line: Concast rates oxyacetylene welding as not recommended, and gas shielded and coated metal arc welding as good.
        - label: Bearings
          line: Bunting says C95400 needs hardened steel shafts and constant lubrication with grease, graphite or molybdenum disulfide.
  uses:
    - where: Bearings, gears and valve parts
      line: Concast and Aviva both list bearings, bushings, spur and worm gears, heavily loaded worm gears, valve bodies, valve guides and valve seats among typical uses. Bunting says the alloy suits low-speed, very high load bearings.
    - where: Marine hardware and ship building
      line: Concast and Aviva list covers for marine hardware and ship building. Wikipedia says aluminium bronzes are used for marine propellers, pumps, valves, shipbuilding components and hull fittings, because of their resistance to sea water.
  can_do:
    - label: Strength as cast
      value: 586 MPa minimum tensile
      line: Continuous-cast C95400 as cast has a minimum tensile strength of 586 MPa and a minimum yield strength of 221 MPa, with 12 % minimum elongation (ASTM B505 minimums, Concast).
    - label: Strength heat treated
      value: 655 MPa minimum tensile
      line: The heat-treated C95400HT sheet gives 655 MPa minimum tensile and 310 MPa minimum yield strength, with 10 % minimum elongation (Concast).
    - label: Weight
      value: 7.45 g/cm3
      benchmark: density
      line: Density is 7.45 g/cm3 at 20 °C (Concast, metric column).
    - label: Carry heat
      value: 58.7 W/(m·K)
      benchmark: thermal_conductivity
      line: Thermal conductivity is 58.7 W/(m·K) at 20 °C (Aviva, metric column).
    - label: Carry current
      value: 13 %IACS
      line: Electrical conductivity is 13 %IACS at 68 °F (Concast; Aviva prints the same value).
    - label: Melting
      value: 1027 to 1038 °C
      line: The solidus is 1027 °C and the liquidus is 1038 °C (Concast, metric column).
    - label: Hardness
      value: 170 BHN as cast
      line: Bunting prints 170 Brinell as cast and 195 heat treated, both at a 3000 kg load. The iCast ASTM B148 sand-casting minimum is 150 BHN.
    - label: Service temperature
      value: '-450 °F to 750 °F'
      line: Bunting prints a minimum operating temperature of -450 °F and a maximum of 750 °F, intermittent to 1200 °F.
  compare: The [copper profile](/profiles/copper/) covers the pure metal, which has no aluminium or iron. The rows below give this alloy's own density, thermal conductivity and elastic modulus. No other alloy was read in this run, so the comparison with other alloys is left to their own profiles.
  compare_rows:
    - label: Density
      benchmark: density
    - label: Thermal conductivity
      benchmark: thermal_conductivity
    - label: Elastic modulus
      benchmark: elastic_modulus
  handling:
    - 'Specify the condition on the order: as cast (586 MPa minimum tensile, 12 % elongation) or heat treated (655 MPa, 10 %).'
    - Use hardened steel shafts and constant lubrication for bearings (Bunting).
    - Avoid oxyacetylene welding (Concast). Gas shielded or coated metal arc welding is rated good.
    - Stress-relieve parts after working or welding (Hendrix), and keep them out of ammonia and ammonium compounds.
    - The CDC advises protective clothing and equipment for work with copper, and changing clothes before going home.
  good_for:
    - Heavily loaded, low-speed bearings, worm gears and valve parts (Concast, Aviva, Bunting).
    - Marine hardware and ship building, where sea water resistance matters (Concast; Wikipedia for sea water).
    - 'Parts that need strength from heat treatment: the C95400HT sheet gives 655 MPa minimum tensile.'
  watch_out:
    - Dealuminification in sea water crevices, under deposits, and with galvanic coupling (Hendrix).
    - Nickel, and the lead named in Bunting's California warning.
    - Oxyacetylene welding is not recommended (Concast).
    - The sand-cast minimums are a casting vendor's reference values, and the thermal expansion is printed as 15.5 by one source and 16.2 by another.
  verdict: 'C95400 is a strong, wear-resistant copper alloy for heavily loaded bearings, gears and marine hardware. Its strength depends on the condition: 586 MPa minimum tensile as cast and 655 MPa heat treated. Wikipedia links its corrosion resistance to its aluminium content, and dealuminification can occur in crevices and under deposits. No sea water corrosion rate, no space-environment data and no confirmed lead limit were found in the pages read.'
  recipe:
    line: C95400 is a copper-aluminium-iron casting alloy. Copper is the matrix, and aluminium is the main alloying element. Iron and nickel are added in smaller amounts, and manganese is limited (ASTM B505 limits as printed on the Concast sheet).
    parts:
      - name: Copper
        symbol: Cu
        share_percent: 83
        share_note: minimum
        role: Matrix of the alloy, 83.00 % minimum as printed.
        source: concast-c95400
        where: Chemical composition table, ASTM B505/B505M-23
      - name: Aluminium
        symbol: Al
        share_percent: 10
        share_high: 11.5
        role: Main alloying element; it forms a tough surface layer that protects the copper-rich alloy (Wikipedia).
        source: concast-c95400
        where: Chemical composition table, ASTM B505/B505M-23
      - name: Iron
        symbol: Fe
        share_percent: 3
        share_high: 5
        role: Alloying addition, 3.00 to 5.00 % as printed.
        source: concast-c95400
        where: Chemical composition table, ASTM B505/B505M-23
      - name: Nickel
        symbol: Ni
        share_note: 1.50 maximum, including cobalt
        role: Limited addition; the Concast sheet says the nickel value includes cobalt.
        source: concast-c95400
        where: Chemical composition table, footnote
      - name: Manganese
        symbol: Mn
        share_note: 0.50 maximum
        role: Limited addition, 0.50 % maximum as printed.
        source: concast-c95400
        where: Chemical composition table, ASTM B505/B505M-23