spore: profile
id: fecralloy
spore_version: 0.2
family: resistance-and-thermocouple-alloys
name: Fecralloy
abbreviation: Fe-Cr-Al-Y
role: resistance heating and catalyst-substrate alloy
category: metals
type: steels-and-stainless
summary: |
  Fecralloy is a ferritic iron-chromium-aluminium alloy with small yttrium and zirconium additions, sold as UNS K92500. Goodfellow gives its nominal makeup as 72.8 % iron, 22 % chromium and 5 % aluminium, with 0.1 % each of yttrium and zirconium. Its melting range is 1380 to 1490 °C, its maximum use temperature in air is 1100 to 1300 °C, and its electrical resistivity is 134 µΩ·cm. Goodfellow says a dense, adherent alumina scale gives it oxidation resistance above 1200 °C. It is used for heating elements and high-temperature sensors, and as a catalyst support foil in exhaust systems.
best_for: Heating elements in air at high temperature, where the printed 1100 to 1300 °C use range and the alumina scale are the main reasons to choose it
weakest_at: 'Strength at temperature: Goodfellow says only that strength is good up to 1000 °C, and no creep data for this grade were found'
identity:
  formula: Ferritic iron-chromium-aluminium alloy, nominal Fe 72.8, Cr 22, Al 5, Y 0.1, Zr 0.1 (wt %), UNS K92500
  source: goodfellow-fecralloy-foil
  where: Composition line of the Fecralloy Foil / Sheet K92500 page; wt % basis from the Goodfellow material information page (approximately 72 to 73 wt % Fe, 22 wt % Cr, 5 wt % Al)
  designations:
    - system: UNS
      code: K92500
      source: goodfellow-fecralloy-foil
      where: Page title 'Fecralloy Foil / Sheet K92500' and the UNS Number field
    - system: Trade name
      code: Fecralloy
      source: goodfellow-fecralloy-info
      where: Page title, Fecralloy Iron/Chromium Alloy material information
tags:
  environments: []
  stresses:
    - extreme-heat
  applications:
    - thermal-control
properties:
  - benchmark: density
    label: Density, Fecralloy foil and sheet
    value: 7.22
    unit: g/cm3
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      form: foil and sheet
      temperature: not stated
    method: Value printed on a supplier product page
    status: ground
    note: The Goodfellow tube group page prints the same composition and density for Fecralloy tube.
    source: goodfellow-fecralloy-foil
    where: Property table, Density row
  - benchmark: melting_point
    label: Melting range, Fecralloy
    value: 1380
    value_high: 1490
    bound: range
    unit: °C
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      pressure: not stated
    method: Range printed on a supplier product page
    status: ground
    source: goodfellow-fecralloy-foil
    where: Property table, Melting point row
  - benchmark: max_service_temp
    label: Maximum use temperature in air, Fecralloy
    value: 1100
    value_high: 1300
    bound: range
    unit: °C
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      environment: air
      duration: not stated
    method: Range printed on a supplier product page; no test duration or failure criterion is given
    status: ground
    note: The page prints a range, not a single limit. The Goodfellow material information page gives the same range for use in air.
    source: goodfellow-fecralloy-foil
    where: Property table, Maximum use temperature in air row
  - benchmark: electrical_resistivity
    label: Electrical resistivity, Fecralloy
    value: 134
    unit: µΩ·cm
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      temperature: not stated
    method: Value printed on a supplier product page
    status: ground
    note: Printed as µOhmcm on the page; the unit is kept as printed. The page does not give the temperature.
    source: goodfellow-fecralloy-foil
    where: Property table, Electrical resistivity row
  - benchmark: curie_temperature
    label: Curie temperature, Fecralloy
    value: 600
    unit: °C
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
    method: Value printed on a supplier product page
    status: ground
    source: goodfellow-fecralloy-foil
    where: Property table, Curie temperature row
  - benchmark: thermal_conductivity
    label: Thermal conductivity at 23 °C, Fecralloy
    value: 16
    unit: W/(m·K)
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      temperature: 23 °C
      unit_in_source: W m-1 K-1
    method: Value printed on a supplier product page
    status: ground
    source: goodfellow-fecralloy-foil
    where: Property table, Thermal conductivity row (printed as 16@23°C)
  - benchmark: cte
    label: Coefficient of thermal expansion, 20 to 100 °C, Fecralloy
    value: 11.1
    unit: ppm/K
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      temperature: 20 to 100 °C
      unit_in_source: x10-6 K-1
    method: Value printed on a supplier product page
    status: ground
    source: goodfellow-fecralloy-foil
    where: Property table, Coefficient of thermal expansion row (printed as 11.1@20-100°C)
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, Fecralloy foil and sheet, room temperature
    value: 560
    unit: MPa
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      form: foil and sheet
      temperature: room temperature (not stated more precisely)
      temper: not stated
    method: Value printed on a supplier product page
    status: ground
    source: goodfellow-fecralloy-foil
    where: Property table, Tensile strength row
  - benchmark: elongation
    label: Elongation at break, Fecralloy foil and sheet
    value: 25
    bound: upper
    unit: '%'
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      form: foil and sheet
      temperature: not stated
    method: Value printed on a supplier product page
    status: ground
    note: Printed as "<25" on the page, so stored as an upper bound. No lower value is given.
    source: goodfellow-fecralloy-foil
    where: Property table, Elongation at break row
  - benchmark: hardness_vickers
    label: Hardness (Vickers), Fecralloy
    value: 230
    unit: kgf mm⁻²
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
      temperature: room temperature (not stated more precisely)
    method: Value printed on a supplier product page
    status: ground
    note: Non-canonical property name; hardness_vickers is not in the canonical property file. The page does not say which form was tested.
    source: goodfellow-fecralloy-foil
    where: Property table, Hardness - Vickers row
  - benchmark: temperature_coefficient
    label: Temperature coefficient, as printed
    value: 0.0001
    unit: K⁻¹
    scope: material
    conditions:
      grade: Fecralloy, UNS K92500
    method: Value printed on a supplier product page; the page does not say which quantity the coefficient describes
    status: ground
    note: Non-canonical property name. The label is only "Temperature coefficient"; the quantity it refers to is not stated, so read it with caution.
    source: goodfellow-fecralloy-foil
    where: Property table, Temperature coefficient row
corrosion:
  - environment: Air at high temperature
    headline: Goodfellow says the alloy resists oxidation and corrosion even above 1200 °C.
    effect: The page attributes this to a dense, adherent alumina (Al2O3) scale. It says trace yttrium and zirconium improve oxide adhesion and longevity. No oxidation rate, weight gain or test duration is given.
    rating: low
    conditions:
      environment: air
      basis: supplier material information page; no test duration stated
    source: goodfellow-fecralloy-info
    where: Introduction; Material Overview, oxidation paragraph
  - environment: Steam at high temperature
    headline: The supplier page cites oxidation resistance in steam up to 1200 °C.
    effect: The page attributes this to Han et al. (2019). That paper was not opened in this run, and no scale thickness or mass change for steam exposure is printed on the page.
    rating: low
    conditions:
      environment: steam
      basis: secondary citation on the supplier page
    source: goodfellow-fecralloy-info
    where: Material Overview, Han et al. (2019) statement
  - environment: Cyclic oxidation
    headline: The page describes a self-healing oxide barrier under cyclic oxidation.
    effect: Goodfellow attributes this to the oxide barrier and to chromium strengthening the Fe/Al2O3 interface. No cycle count or mass change is printed.
    rating: low
    conditions:
      environment: air, cyclic
      basis: supplier material information page; no test data printed
    source: goodfellow-fecralloy-info
    where: Material Overview, oxidation paragraph
risks:
  hazards: []
  failure_risks:
    - mode: Oxidation above the printed use range
      trigger: Continuous service above 1100 to 1300 °C in air
      consequence: Goodfellow gives a use range but no oxidation rate, so the time to failure above it cannot be taken from the page.
      severity: moderate
      source: goodfellow-fecralloy-foil
      where: Property table, Maximum use temperature in air row
    - mode: Loss of strength at temperature under load
      trigger: Loaded service above about 1000 °C
      consequence: Goodfellow says the alloy has good mechanical strength up to 1000 °C. No strength values at higher temperature for this grade are printed on the pages read.
      severity: moderate
      source: goodfellow-fecralloy-info
      where: Material Overview, strength sentence
  side_effects: []
  handling:
    - text: The related VDM Aluchrom Y Hf data sheet, a different yttrium-hafnium FeCrAl grade, says oxide layers and weld heat tint adhere more strongly than on stainless steels, so descaling should be checked when ordering.
      source: vdm-aluchrom-yhf
      where: Descaling and pickling section
    - text: The Goodfellow pages print a use range of 1100 to 1300 °C in air but give no test data for it. Design to the lower end of the range unless a test shows otherwise.
      source: goodfellow-fecralloy-foil
      where: Property table, Maximum use temperature in air row
  mitigations: []
uses:
  - application: thermal-control
    device: Resistance heating elements
    example: Goodfellow lists heating elements first among its common uses for Fecralloy.
    source: goodfellow-fecralloy-info
    where: Applications and Advantages section; Introduction
  - application: thermal-control
    device: Gas burner filters
    example: Goodfellow lists gas burner filters among the common uses. This is a ground use, not a space use.
    source: goodfellow-fecralloy-info
    where: Applications and Advantages section
supply:
  - subject: Iron
    producers:
      - country: Australia
        share_percent: 37.7
        year: 2025
      - country: Brazil
        share_percent: 16.2
        year: 2025
      - country: India
        share_percent: 11.9
        year: 2025
      - country: China
        share_percent: 11.2
        year: 2025
    critical_lists:
      - list: USGS 2025 List of Critical Minerals
        listed: false
    recycling: 'USGS iron ore chapter: ''None''. It refers readers to the Iron and Steel Scrap chapter.'
    substitutes:
      - 'USGS: the only source of primary iron is iron ore, used directly as direct-shipping ore or converted to briquettes, concentrates, DRI, iron nuggets, pellets, or sinter.'
    source: usgs-mcs2026-iron
    where: World Mine Production table, usable ore, 2025e (world total 2,600,000 thousand t; shares calculated by Space Mushroom against that printed total). Recycling and Substitutes sections. Critical list status from the USGS 2025 final list page.
  - subject: Chromium
    producers:
      - country: South Africa
        share_percent: 45.1
        year: 2025
      - country: Turkey
        share_percent: 17.6
        year: 2025
      - country: Kazakhstan
        share_percent: 13.7
        year: 2025
    critical_lists:
      - list: USGS 2025 List of Critical Minerals
        listed: true
    recycling: 'USGS: in 2025, recycled chromium in reported stainless-steel scrap receipts accounted for 21% of apparent consumption.'
    substitutes:
      - 'USGS: chromium has no substitute in stainless steel, the leading end use, or in superalloys.'
    source: usgs-mcs2026-chromium
    where: World Mine Production and Reserves table, 2025e column (world total 51,000 thousand t; shares calculated by Space Mushroom; Kazakhstan value estimated by USGS); Recycling; Substitutes. Critical list from the USGS 2025 final list page.
  - subject: Aluminium
    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
    critical_lists:
      - list: USGS 2025 List of Critical Minerals
        listed: true
    recycling: 'USGS: in the United States, aluminium recovered from old scrap was equivalent to about 28% of apparent consumption in 2025.'
    substitutes:
      - 'USGS: composites can substitute for aluminium in aircraft fuselages and wings, and copper can replace aluminium in electrical and heat-exchange applications.'
    source: usgs-mcs2026-aluminum
    where: World Smelter Production table, 2025e column (world total 74,000 thousand t, rounded; shares calculated by Space Mushroom against that printed total); Recycling; Substitutes. Critical list from the USGS 2025 final list page.
documents:
  - title: 'Goodfellow: Fecralloy Foil / Sheet K92500 product page (properties and UNS)'
    type: datasheet
    url: https://www.goodfellow.com/usa/fecralloy-foil-group
  - title: 'Goodfellow: Fecralloy Tube product page (same property table)'
    type: datasheet
    url: https://www.goodfellow.com/usa/fecralloy-tube-group
  - title: 'Goodfellow: Fecralloy Iron/Chromium Alloy material information'
    type: datasheet
    url: https://www.goodfellow.com/usa/resources/fecralloy-iron-chromium-alloy-material-information/
  - title: Kanthal APM wire datasheet (related FeCrAl grade, not Fecralloy)
    type: datasheet
    url: https://kanthal.com/en/products/material-datasheets/wire/na/kanthal-apm/?show=pdf
  - title: VDM Metals Material Data Sheet No. 4149, Aluchrom Y Hf (related grade, not Fecralloy; mirror copy)
    type: datasheet
    url: https://alloy59.de/fileadmin/user_upload/Downloads/Data_Sheets/Data_Sheet_VDM_Aluchrom_Y_Hf.pdf
    year: 2022
  - title: 'USGS Mineral Commodity Summaries 2026: Iron Ore'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-iron-ore.pdf
    year: 2026
  - title: 'USGS Mineral Commodity Summaries 2026: Chromium'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-chromium.pdf
    year: 2026
  - title: 'USGS Mineral Commodity Summaries 2026: Aluminum'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
    year: 2026
  - title: 'USGS Mineral Commodity Summaries 2026: Yttrium'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-yttrium.pdf
    year: 2026
  - title: 'USGS: About the 2025 List of Critical Minerals (final list of 60 minerals)'
    type: report
    url: https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals
    year: 2025
gaps:
  - 'Hazards: no Fecralloy-specific GHS classification or safety data sheet was read in this run. The Goodfellow pages carry no hazard statements, and the Sigma-Aldrich substance listing did not load. The hazards list is left empty.'
  - 'Properties: only one supplier page prints a full Fecralloy property table, and the tube page repeats the same values. No specific heat, elastic modulus, yield strength, or strength or resistivity at temperature was printed for this grade. Metal Suppliers Online returned HTTP 503 in this run.'
  - The Kanthal APM and VDM Aluchrom Y Hf data sheets are related FeCrAl grades with different compositions. Their values are not Fecralloy values, so they are used only as context in the story and in the handling note, never as properties.
  - Temperature coefficient 0.0001 K-1 is printed without naming the quantity; it is stored as printed with a note.
  - The melting range, use range, resistivity and tensile values are printed without a stated temper, grain condition, or test duration.
  - Elongation is printed as '<25' and stored as an upper bound.
  - 'Yttrium: the USGS 2026 yttrium chapter says China produced most of the world supply in 2025, but prints no world share figure, so no supply row is entered. Yttrium is on the USGS 2025 final list.'
  - The yttrium and zirconium shares (0.1 % each) are printed without a unit on the foil page. The Goodfellow material information page gives the Fe, Cr and Al figures in wt %, so the 0.1 values are read as wt % by analogy and are marked as such in the recipe.
  - Oxidation rate, weight gain, scale spallation and cyclic-oxidation test data for Fecralloy were not found in a fetched source. Springer and OSTI papers on Fe-Cr-Al-Y scales did not open in this run.
  - The Goodfellow page cites Hoffman et al. (2022) for oxide film thickness after 1200 °C steam exposure. The value is left out because its unit is printed with an encoding error on the page.
  - 'Space use: no source was found for Fecralloy on spacecraft or flight hardware, so the uses are terrestrial. The catalyst-support use has no matching application in the allowed list and is named in the story only.'
  - EU critical raw materials list not checked for iron, chromium, aluminium or yttrium. Only the USGS 2025 list is recorded.
  - Atomic weights of the constituents and a CAS number for Fecralloy were not read from a fetched page, so the recipe parts carry shares only.
  - 'Designations: only the UNS K92500 and the trade name Fecralloy are printed on the pages read. No EN, DIN, JIS or AISI number was found.'
sources:
  goodfellow-fecralloy-foil:
    title: Fecralloy Foil / Sheet K92500 (Goodfellow), property table and composition
    url: https://www.goodfellow.com/usa/fecralloy-foil-group
    year: 2026
    kind: datasheet
    license: Supplier product page (cited, not reproduced)
  goodfellow-fecralloy-tube:
    title: Fecralloy Tube (Goodfellow), property table and composition
    url: https://www.goodfellow.com/usa/fecralloy-tube-group
    year: 2026
    kind: datasheet
    license: Supplier product page (cited, not reproduced)
  goodfellow-fecralloy-info:
    title: 'Fecralloy Iron/Chromium Alloy: material information (Goodfellow)'
    url: https://www.goodfellow.com/usa/resources/fecralloy-iron-chromium-alloy-material-information/
    year: 2026
    kind: datasheet
    license: Supplier web page (cited, not reproduced)
  kanthal-apm-wire:
    title: Kanthal APM wire material datasheet (related FeCrAl grade, not Fecralloy)
    url: https://kanthal.com/en/products/material-datasheets/wire/na/kanthal-apm/?show=pdf
    kind: datasheet
    license: Manufacturer datasheet (cited, not reproduced)
  vdm-aluchrom-yhf:
    title: VDM Metals Material Data Sheet No. 4149, Rev. 02, Aluchrom Y Hf (related grade, not Fecralloy; mirror copy)
    url: https://alloy59.de/fileadmin/user_upload/Downloads/Data_Sheets/Data_Sheet_VDM_Aluchrom_Y_Hf.pdf
    year: 2022
    kind: datasheet
    license: Manufacturer datasheet (cited, not reproduced)
  usgs-mcs2026-iron:
    title: Mineral Commodity Summaries 2026, Iron Ore
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-iron-ore.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-mcs2026-chromium:
    title: Mineral Commodity Summaries 2026, Chromium
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-chromium.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-mcs2026-aluminum:
    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)
  usgs-mcs2026-yttrium:
    title: Mineral Commodity Summaries 2026, Yttrium
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-yttrium.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-crit2025:
    title: About the 2025 List of Critical Minerals (USGS, final list of 60 minerals)
    id: Final 2025 List of Critical Minerals, November 2025
    url: https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals
    year: 2025
    kind: web
    license: public domain (USGS)
license: CC-BY-4.0
updated: '2026-10-26'
review:
  status: draft
  method: assistant
  checked_values: 11
  unreachable: 3
  caveats: 4
  note: 'Values were read by an AI assistant on 2026-10-26 from the Goodfellow Fecralloy foil and tube pages (the two pages print the same table) and the USGS 2026 chapters. Unreachable in this run: the Metals Suppliers Online Fecralloy page (HTTP 503), the Sigma-Aldrich Fecralloy substance page (timeout), and the Springer and OSTI oxidation papers. Caveats: all Fecralloy values come from supplier pages, with no temper or test condition printed; the Kanthal APM and VDM Aluchrom Y Hf sheets are related grades and are not used as properties; the aluminium and chromium shares are calculated from printed world totals; no hazard data for this grade were read.'
story:
  risk_groups:
    - title: For people
      lead: Fecralloy is a metal alloy. No hazard classification for this grade was read in this run, and the supplier pages carry no hazard statements.
      level: 1
      verdict: No data read
      points:
        - label: Classification
          line: No safety data sheet or GHS classification for K92500 was read. The Goodfellow pages carry no hazard, safety or handling statements.
        - label: Fumes and dust
          line: No source was read on fume or dust from grinding or welding this alloy, so none is stated here.
    - title: If it fails
      lead: The failure routes in the sources are temperature and load. The supplier gives a use range but no failure rates.
      points:
        - label: Overheating
          line: Goodfellow gives a maximum use temperature in air of 1100 to 1300 °C. It gives no time to failure above that range.
        - label: Strength under load
          line: Goodfellow says the alloy has good mechanical strength up to 1000 °C. No strength values at higher temperature are printed for this grade.
    - title: Handling and storage
      points:
        - label: Design temperature
          line: Goodfellow prints a use range, not a single limit. Design to the lower end of the range unless a test shows otherwise.
  why: Fecralloy is a ferritic iron-chromium-aluminium alloy with small yttrium and zirconium additions (UNS K92500). Goodfellow describes a dense, adherent alumina scale that gives oxidation resistance in air. The alloy is an electrical resistor, with a resistivity of 134 µΩ·cm, and it melts between 1380 and 1490 °C. Its weak points are the lack of strength data above 1000 °C and the lack of any space-flight data. It is used in heating elements, gas burner filters and high-temperature sensors, and as a catalyst support foil in exhaust systems.
  uses:
    - where: Heating elements
      line: Goodfellow lists heating elements first among the common uses of Fecralloy, along with gas burner filters, catalytic converter supports and high-temperature sensors.
    - where: Gas burner filters
      line: Goodfellow lists gas burner filters among the common uses. This is a ground use. No space use was found.
    - where: Catalyst supports on the ground
      line: Goodfellow lists catalytic converter supports among the common uses. Exhaust catalysts are a terrestrial use, so this profile does not list it as a space application.
  can_do:
    - label: Heat in air
      value: 1100 to 1300 °C
      benchmark: max_service_temp
      line: The maximum use temperature in air is printed as 1100 to 1300 °C. The page gives no test duration.
    - label: Carry current as a heater
      value: 134 µΩ·cm
      benchmark: electrical_resistivity
      line: The electrical resistivity is 134 µΩ·cm. The page does not give the temperature for this value.
    - label: Stay solid when hot
      value: 1380 to 1490 °C
      benchmark: melting_point
      line: The melting range is printed as 1380 to 1490 °C.
    - label: Strength in foil
      value: 560 MPa tensile
      benchmark: ultimate_tensile_strength
      line: The tensile strength is 560 MPa for foil and sheet. The page does not state the temper.
  compare: This profile has no second heating alloy read in the same run, so the compare rows use Fecralloy's own figures. For context only, Kanthal's APM wire datasheet, a related FeCrAl grade with a different composition, gives a higher maximum continuous operating temperature in air than the Fecralloy range printed above. That is not a Fecralloy value. Read the compare rows as Fecralloy's own numbers.
  compare_rows:
    - label: Density
      benchmark: density
    - label: Max use temperature in air
      benchmark: max_service_temp
    - label: Electrical resistivity
      benchmark: electrical_resistivity
  handling:
    - Design to the lower end of the printed 1100 to 1300 °C use range in air (Goodfellow).
    - 'Descaling: the related VDM Aluchrom Y Hf sheet says oxide layers and weld heat tint adhere strongly, so check the need for descaling when ordering.'
    - No handling or storage advice is printed on the Fecralloy pages read.
  good_for:
    - 'Heating elements in air: 134 µΩ·cm resistivity and a printed use range of 1100 to 1300 °C (Goodfellow).'
    - 'Oxidation resistance in air: a dense, adherent alumina scale, which Goodfellow says protects the alloy above 1200 °C.'
    - 'Foil at room temperature: 560 MPa tensile strength (Goodfellow foil page).'
  watch_out:
    - 'Strength at temperature: Goodfellow says good strength only up to 1000 °C, and no creep data for this grade were found.'
    - Only supplier data for this grade; no temper, test duration or oxidation rate is printed.
    - No hazard data were read for K92500, and no space-flight data were found.
  verdict: 'Fecralloy is a resistance and high-temperature oxidation alloy with a printed use range of 1100 to 1300 °C in air. The supplier data are thin: they give the main properties, but no strength data above 1000 °C, no oxidation rate and no hazard classification.'
  recipe:
    line: Fecralloy is a ferritic iron-chromium-aluminium alloy with yttrium and zirconium trace additions. Goodfellow gives the nominal composition as Fe 72.8, Cr 22, Al 5, Y 0.1, Zr 0.1, and its material information page gives the Fe, Cr and Al figures in wt %.
    parts:
      - name: Iron
        symbol: Fe
        share_percent: 72.8
        role: The matrix of the alloy, a ferritic iron-chromium solid solution.
      - name: Chromium
        symbol: Cr
        share_percent: 22
        role: Forms the chromium-rich part of the matrix and helps the alumina scale bond to the metal (Goodfellow).
      - name: Aluminium
        symbol: Al
        share_percent: 5
        role: Forms the dense, adherent alumina (Al2O3) scale that protects the alloy in air (Goodfellow).
      - name: Yttrium
        symbol: 'Y'
        share_percent: 0.1
        role: A trace addition that Goodfellow says improves oxide adhesion and longevity. The printed share has no unit on the foil page, and it is read as wt %.
      - name: Zirconium
        symbol: Zr
        share_percent: 0.1
        role: A trace addition that Goodfellow lists with yttrium for oxide adhesion. The printed share has no unit on the foil page, and it is read as wt %.