METGLAS 2826MB (nickel-based magnetic alloy ribbon) Fe-Ni-B-Mo

spore: profile
id: metglas-2826mb
spore_version: 0.2
family: magnet-and-superconducting-alloys
name: METGLAS 2826MB (nickel-based magnetic alloy ribbon)
abbreviation: Fe-Ni-B-Mo
role: magnetic core, field sensor and shield
category: metals
type: magnet-alloys
summary: |
  METGLAS 2826MB is a nickel-based amorphous metal ribbon from Metglas, Inc. The manufacturer's technical bulletin gives a density of 7.90 g/cm3 and a saturation induction of 0.88 T, and lists field sensors, shielding and high-frequency cores as its applications. Its maximum DC permeability is 800000 when annealed and above 50000 as cast, and the bulletin prints no unit for it.
best_for: Field sensors and magnetic shielding where a high annealed DC permeability (800000 in the bulletin) is the goal
weakest_at: 'Thin evidence base: the full property set comes from one manufacturer bulletin dated 2011, the permeability has no unit, and no corrosion test or space data were found'
identity:
  formula: Amorphous iron nickel-based ribbon with molybdenum and boron; the SDS prints composition ranges only for a six-alloy family
  crystal_system: amorphous (no crystal lattice)
  source: metglas-sds
  where: 'Section 1, Other means of identification: Amorphous Metal Ribbon; Section 3, composition table'
  designations:
    - system: Trade name
      code: 2826MB
      source: metglas-datasheet
      where: Title block, Magnetic Alloy 2826MB (nickel-based)
tags:
  environments: []
  stresses: []
  applications:
    - electronics-and-chips
properties:
  - benchmark: density
    label: Density, as printed in the bulletin
    value: 7.9
    unit: g/cm3
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: '7.90'
      condition: no test condition printed in the table
    method: Value printed in the manufacturer technical bulletin, Physical Properties table
    status: ground
    note: The product page prints 7.9 for the same property; the bulletin's two-decimal value is used here.
    source: metglas-datasheet
    where: Physical Properties, Density (g/cm3)
  - benchmark: saturation_induction
    label: Saturation induction
    value: 0.88
    unit: T
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      condition: no test condition printed in the table
    method: Value printed in the manufacturer technical bulletin, Magnetic Properties table
    status: ground
    source: metglas-datasheet
    where: Magnetic Properties, Saturation Induction (T)
  - benchmark: dc_permeability
    label: Maximum DC permeability, annealed
    value: 800000
    unit: '-'
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      condition: annealed
      printed_as: 800,000
      unit_printed: none
    method: Value printed in the manufacturer technical bulletin; the bulletin prints no unit, so the value is entered as a dimensionless number
    status: ground
    source: metglas-datasheet
    where: Magnetic Properties, Maximum D.C. Permeability, Annealed
  - benchmark: dc_permeability
    label: Maximum DC permeability, as cast
    value: 50000
    bound: lower
    unit: '-'
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      condition: as cast
      printed_as: '>50,000'
      unit_printed: none
    method: Lower bound printed in the manufacturer technical bulletin; the bulletin prints no unit, so the value is entered as a dimensionless number
    status: ground
    source: metglas-datasheet
    where: Magnetic Properties, Maximum D.C. Permeability, As Cast
  - benchmark: saturation_magnetostriction
    label: Saturation magnetostriction
    value: 12
    unit: ppm
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: '12'
    method: Value printed in the manufacturer technical bulletin, Magnetic Properties table
    status: ground
    source: metglas-datasheet
    where: Magnetic Properties, Saturation Magnetostriction (ppm)
  - benchmark: electrical_resistivity
    label: Electrical resistivity
    value: 138
    unit: µΩ.cm
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: '138'
      temperature: not printed
    method: Value printed in the manufacturer technical bulletin, Magnetic Properties table
    status: ground
    note: The product page prints the same 138 in µΩ-cm.
    source: metglas-datasheet
    where: Magnetic Properties, Electrical Resistivity (µΩ.cm)
  - benchmark: curie_temperature
    label: Curie temperature
    value: 353
    unit: °C
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: '353'
    method: Value printed in the manufacturer technical bulletin, Magnetic Properties table
    status: ground
    source: metglas-datasheet
    where: Magnetic Properties, Curie Temperature (°C)
  - benchmark: elastic_modulus
    label: Elastic modulus
    value: 100
    value_high: 110
    bound: range
    unit: GPa
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: 100-110
      form: ribbon
    method: Range printed in the manufacturer technical bulletin, Physical Properties table
    status: ground
    source: metglas-datasheet
    where: Physical Properties, Elastic Modulus (GPa)
  - benchmark: ultimate_tensile_strength
    label: Tensile strength
    value: 1
    value_high: 2
    bound: range
    unit: GPa
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: 1-2
      form: ribbon; heat-treatment state not printed
    method: Range printed in the manufacturer technical bulletin, Physical Properties table (the bulletin spells the label Tensil Strength)
    status: ground
    source: metglas-datasheet
    where: Physical Properties, Tensile Strength (GPa)
  - benchmark: lamination_factor
    label: Lamination factor
    value: 75
    bound: lower
    unit: '%'
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: '>75'
    method: Lower bound printed in the manufacturer technical bulletin, Physical Properties table
    status: ground
    source: metglas-datasheet
    where: Physical Properties, Lamination Factor (%)
  - benchmark: cte
    label: Thermal expansion coefficient
    value: 11.7
    unit: ppm/°C
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      temperature_range: not printed
    method: Value printed in the manufacturer technical bulletin, Physical Properties table; the bulletin does not print the temperature range
    status: ground
    source: metglas-datasheet
    where: Physical Properties, Thermal Expansion (ppm/°C)
  - benchmark: crystallization_temperature
    label: Crystallization temperature
    value: 410
    unit: °C
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: '410'
    method: Value printed in the manufacturer technical bulletin, Physical Properties table
    status: ground
    source: metglas-datasheet
    where: Physical Properties, Crystallization Temperature (°C)
  - benchmark: max_service_temp
    label: Continuous service temperature
    value: 125
    unit: °C
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      basis: continuous service
    method: Value printed in the manufacturer technical bulletin, Physical Properties table
    status: ground
    source: metglas-datasheet
    where: Physical Properties, Continuous Service Temp. (°C)
  - benchmark: thickness
    label: Ribbon thickness, as printed on the product page
    value: 29
    unit: microns
    scope: material
    conditions:
      grade: METGLAS 2826MB (nickel-based)
      printed_as: '29'
    method: Value printed on the manufacturer product page, General Properties, Physical list; the bulletin does not print a thickness
    status: ground
    source: metglas-web
    where: 2826MB General Properties, Physical, Thickness (microns)
corrosion:
  - environment: Moisture and corrosive material (storage and incompatibilities)
    headline: The SDS lists moisture and corrosive material as incompatible with the product
    effect: The combined SDS for 2826MB lists moisture and corrosive material as incompatible, and says to store the product under local regulations. The sheet gives no corrosion rate, test or exposure time for this grade.
    rating: unknown
    source: metglas-sds
    where: Section 10, Incompatible materials; Section 7, Conditions for safe storage
  - environment: Stated corrosion resistance (manufacturer benefit)
    headline: The bulletin lists higher corrosion resistance as a benefit of 2826MB
    effect: The bulletin and product page list higher corrosion resistance as a benefit. Neither gives a test method, environment, exposure time or comparison alloy, so the claim cannot be quantified from the sources read.
    rating: unknown
    source: metglas-datasheet
    where: Benefits list, page 1
  - environment: Heating (thermal ageing)
    headline: The bulletin prints a crystallization temperature of 410 °C and a continuous service temperature of 125 °C
    effect: The bulletin gives a crystallization temperature of 410 °C and a continuous service temperature of 125 °C. It does not say how properties change after long heating between these limits.
    rating: unknown
    source: metglas-datasheet
    where: Physical Properties, Crystallization Temperature and Continuous Service Temp.
risks:
  hazards:
    - text: The combined SDS classes the product as an article under normal use, with no GHS classification, no signal word and no known significant effects or critical hazards.
      ghs: []
      source: metglas-sds
      where: Section 2, OSHA/HCS status, Classification and GHS label elements
    - text: The SDS lists nickel as IARC group 1 and as reasonably anticipated to be a human carcinogen (NTP); the SDS gives no nickel amount for 2826MB alone.
      ghs: []
      source: metglas-sds
      where: Section 11, Carcinogenicity classification table
    - text: The PubChem GHS record for the element nickel lists H317 (may cause an allergic skin reaction), H351 (suspected of causing cancer) and H372 (causes damage to organs through prolonged or repeated exposure). These are hazards of the element, not a measured hazard of this ribbon.
      ghs:
        - H317
        - H351
        - H372
      source: pubchem-nickel
      where: Safety and Hazards, GHS Classification, first hazard list
  failure_risks:
    - mode: Loss of the amorphous state on heating
      trigger: Heating toward the crystallization temperature
      consequence: The bulletin prints a crystallization temperature of 410 °C. It does not say which magnetic or mechanical properties change above it.
      severity: moderate
      source: metglas-datasheet
      where: Physical Properties, Crystallization Temperature (°C)
    - mode: Permeability depends on the anneal
      trigger: Use in the as-cast state instead of the annealed state
      consequence: The bulletin prints a maximum DC permeability of 800000 when annealed and above 50000 as cast, and says the alloy can be annealed for very high DC permeability.
      severity: moderate
      source: metglas-datasheet
      where: Magnetic Properties, Maximum D.C. Permeability; benefits list, page 1
    - mode: Toxic vapour in a fire
      trigger: Fire involving the product
      consequence: The SDS says there is no specific fire or explosion hazard, but decomposition products may include metal oxides and toxic vapour.
      severity: low
      source: metglas-sds
      where: Section 5, Specific hazards and Hazardous thermal decomposition products
  side_effects:
    - text: Metal fume fever can follow exposure to high concentrations of fumes from the product.
      affects: People exposed to fumes at high concentration
      source: metglas-sds
      where: Section 11, Other information
  handling:
    - text: Take care with items that are sharp or heavy, and wear appropriate personal protective equipment.
      source: metglas-sds
      where: Section 7, Precautions for safe handling; Section 8 referenced
    - text: Store the product under local regulations and keep it away from moisture and corrosive material.
      source: metglas-sds
      where: Section 7, Conditions for safe storage; Section 10, Incompatible materials
  mitigations: []
uses:
  - application: electronics-and-chips
    device: Field sensors
    example: The bulletin lists field sensors as an application of 2826MB.
    source: metglas-datasheet
    where: Applications list, top left
  - application: electronics-and-chips
    device: Magnetic shielding
    example: The product page lists shielding applications for 2826MB. The page gives no shield test data for this grade.
    source: metglas-web
    where: 2826MB product section, Applications
  - application: electronics-and-chips
    device: High-frequency magnetic cores
    example: The bulletin lists high frequency cores as an application of 2826MB.
    source: metglas-datasheet
    where: Applications list
  - application: electronics-and-chips
    device: Magnetomechanical sensors
    example: The product page lists magnetomechanical sensors among the applications of 2826MB.
    source: metglas-web
    where: 2826MB product section, Applications
supply:
  - subject: Nickel
    producers:
      - country: Indonesia
        share_percent: 66.7
        year: 2025
      - country: Philippines
        share_percent: 6.9
        year: 2025
      - country: Russia
        share_percent: 5.1
        year: 2025
      - country: Canada
        share_percent: 3.6
        year: 2025
    critical_lists: []
    recycling: 'USGS: most secondary nickel was in the form of nickel content of stainless-steel scrap, and most recycled nickel was used to make new alloys.'
    substitutes:
      - 'USGS: low-nickel, duplex or ultrahigh-chromium stainless steels have been substituted for austenitic grades in some uses.'
    source: usgs-mcs2026-nickel
    where: World Mine Production and Reserves table, 2025e; world total (rounded) 3,900,000 t in 2025e; country shares calculated by Space Mushroom against that total; Recycling; Substitutes paragraph
  - subject: Nickel
    producers: []
    critical_lists:
      - list: USGS 2025 List of Critical Minerals
        listed: true
    substitutes: []
    source: usgs-crit2025
    where: Minerals named on the 2025 list (nickel is named)
  - subject: Molybdenum
    producers:
      - country: China
        share_percent: 37.3
        year: 2025
      - country: Chile
        share_percent: 16.2
        year: 2025
      - country: United States
        share_percent: 15.4
        year: 2025
      - country: Peru
        share_percent: 15
        year: 2025
    critical_lists: []
    recycling: 'USGS: molybdenum is recycled as a component of catalysts, ferrous scrap and superalloy scrap.'
    substitutes: []
    source: usgs-mcs2026-molybdenum
    where: World Mine Production and Reserves table, 2025e; world total (rounded) 260,000 in 2025e; country shares calculated by Space Mushroom against that total; Recycling paragraph
  - subject: Molybdenum
    producers: []
    critical_lists:
      - list: USGS 2025 List of Critical Minerals
        listed: false
    substitutes: []
    source: usgs-crit2025
    where: Minerals named on the 2025 list (molybdenum is not named)
  - subject: Boron
    producers: []
    critical_lists:
      - list: USGS 2025 List of Critical Minerals
        listed: true
    substitutes: []
    source: usgs-crit2025
    where: Minerals named on the 2025 list (boron is named); no producer shares for boron were read
  - subject: Silicon
    producers: []
    critical_lists:
      - list: USGS 2025 List of Critical Minerals
        listed: true
    substitutes: []
    source: usgs-crit2025
    where: Minerals named on the 2025 list (silicon is named); no producer shares for silicon were read
documents:
  - title: Metglas Magnetic Alloy 2826MB (nickel-based) Technical Bulletin (ref 2826MB04202011)
    type: datasheet
    url: https://metglas.com/wp-content/uploads/2021/06/2826MB-Magnetic-Alloy-updated.pdf
    year: 2011
  - title: Material Safety Data Sheet for 2705M, 2826MB, 2826MB3, 2714A, AEHF-1 and 2605CO (version 1)
    type: sds
    url: https://metglas.com/wp-content/uploads/2021/03/2705M-2826MB-2826MB3-2714A-AEHF-1-and-2605CO_SDSFinal.pdf
    year: 2020
  - title: Mineral Commodity Summaries 2026, Nickel (USGS)
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-nickel.pdf
    year: 2026
  - title: Mineral Commodity Summaries 2026, Molybdenum (USGS)
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-molybdenum.pdf
    year: 2026
gaps:
  - No per-grade composition for 2826MB was printed in the sources read. The SDS composition table covers six alloys (iron, cobalt, nickel, silicon, molybdenum, boron, manganese) and gives ranges by weight; it says cobalt is not present in 2826MB. The composition Fe40Ni38Mo4B18 named in the planning note was not found in any source fetched in this run and is not used.
  - No UNS, EN, ASTM, JIS, AISI or DIN designation for 2826MB was printed in the sources read. Only the trade name 2826MB is listed.
  - Vickers hardness of 740 (50 g load) is printed in the bulletin and product page without a unit, so it is left out rather than given a unit that is not printed.
  - Maximum DC permeability is printed without a unit in the bulletin and product page; the two values are entered as dimensionless numbers.
  - The SDS relative density of 7.5 to 8 applies to the six-alloy family and is not used as a 2826MB value; the bulletin's 7.90 g/cm3 is used.
  - No annealing temperature or time for 2826MB is printed. The bulletin shows no-field and longitudinal field anneal curves without values.
  - No corrosion rate, humidity test, salt-spray result or exposure time for 2826MB was found; higher corrosion resistance is a manufacturer benefit claim with no test.
  - No space flight, vacuum, cryogenic or radiation data for 2826MB were found in the sources read. AEHF-1 appears only in the SDS product list.
  - The magnetic shielding use rests on the manufacturer's product page. A 2016 APS abstract on 2826MB shielding was found, but its page gave only a truncated description and did not name 2826MB, so it is not used.
  - 'Supply: nickel and molybdenum country shares are calculated by Space Mushroom from the USGS 2025e world totals. No producer shares were read for boron or silicon. Boron and silicon critical-list status is from the USGS 2025 list only.'
  - 'Property names not in spores/property-canon.yaml and used here: saturation_magnetostriction and crystallization_temperature.'
  - The bulletin is dated 2011 (ref 2826MB04202011). The 2016 URL serves the same bulletin, so it is cited once. The SDS is a combined sheet for six alloys and is dated 07/17/2020.
  - Wikipedia (amorphous metal article) is used for family history only; it gives no 2826MB value.
sources:
  metglas-datasheet:
    title: Metglas Magnetic Alloy 2826MB (nickel-based) Technical Bulletin
    id: Metglas technical bulletin, ref 2826MB04202011, copyright 2003-2011
    url: https://metglas.com/wp-content/uploads/2021/06/2826MB-Magnetic-Alloy-updated.pdf
    year: 2011
    kind: datasheet
    license: manufacturer document, linked not reproduced
  metglas-web:
    title: 'METGLAS Magnetic Materials: 2826MB product section (General Properties and Characteristics)'
    id: Metglas product page, undated
    url: https://metglas.com/magnetic-materials/
    kind: web
    license: manufacturer web page, linked not reproduced
  metglas-sds:
    title: Material Safety Data Sheet for 2705M, 2826MB, 2826MB3, 2714A, AEHF-1 and 2605CO
    id: Metglas SDS, version 1, date of issue 07/17/2020
    url: https://metglas.com/wp-content/uploads/2021/03/2705M-2826MB-2826MB3-2714A-AEHF-1-and-2605CO_SDSFinal.pdf
    year: 2020
    kind: datasheet
    license: supplier document, linked not reproduced
  usgs-mcs2026-nickel:
    title: Mineral Commodity Summaries 2026, Nickel
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-nickel.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-mcs2026-molybdenum:
    title: Mineral Commodity Summaries 2026, Molybdenum
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-molybdenum.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-crit2025:
    title: About the 2025 List of Critical Minerals (USGS, 60 minerals, page dated November 6, 2025)
    id: USGS web page, 2025 final list
    url: https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals
    year: 2025
    kind: web
    license: public domain (USGS)
  pubchem-nickel:
    title: PubChem compound record, Nickel (CID 935), Safety and Hazards, GHS Classification
    id: CID 935
    url: https://pubchem.ncbi.nlm.nih.gov/compound/935
    kind: database
    license: public domain (NCBI)
  wikipedia-amorphous-metal:
    title: Amorphous metal (Wikipedia; the Metglas redirect lands here)
    id: English Wikipedia article, read for family history only
    url: https://en.wikipedia.org/wiki/Amorphous_metal
    kind: web
    license: CC BY-SA (Wikipedia)
license: CC-BY-4.0
updated: '2026-11-01'
review:
  status: draft
  method: assistant
  checked_values: 14
  unreachable: 0
  caveats: 3
  note: Read by an AI assistant on 2026-11-01 from the Metglas technical bulletin, the Metglas product page, the combined Metglas SDS, USGS Mineral Commodity Summaries 2026 (nickel and molybdenum), the USGS 2025 critical minerals list, PubChem (nickel) and Wikipedia. Values copied as printed. Supply shares are calculated from the USGS 2025e world totals.
story:
  recipe:
    line: METGLAS 2826MB is an iron nickel-based amorphous ribbon with molybdenum and boron. The sources read print composition only as weight ranges for a six-alloy family in the SDS, and the SDS says cobalt is not present in 2826MB. The process used to make the ribbon is not printed in the sources read.
    parts:
      - name: Iron
        symbol: Fe
        role: Named as part of the iron nickel-based grade on the product page; no amount for 2826MB is printed.
        share_note: amount not printed for 2826MB
        source: metglas-web
        where: 2826MB product section, title line
      - name: Nickel
        symbol: Ni
        role: Named in the bulletin as the base of the grade (nickel-based); no amount for 2826MB is printed.
        share_note: amount not printed for 2826MB
        source: metglas-datasheet
        where: Title block
      - name: Molybdenum
        symbol: Mo
        role: Alloying element named in the SDS composition table for the family.
        share_note: range in the six-alloy SDS table only; not 2826MB-specific
        source: metglas-sds
        where: Section 3, composition table
      - name: Boron
        symbol: B
        role: Glass former named in the SDS composition table for the family.
        share_note: range in the six-alloy SDS table only; not 2826MB-specific
        source: metglas-sds
        where: Section 3, composition table
      - name: Silicon
        symbol: Si
        role: Glass former named in the SDS composition table for the family.
        share_note: range in the six-alloy SDS table only; not 2826MB-specific
        source: metglas-sds
        where: Section 3, composition table
  risk_groups:
    - title: For people
      level: 1
      verdict: Not classified; fume risk
      lead: The combined SDS classes the product as an article under normal use, with no GHS classification. Fumes from heating or processing are the main health concern the sheet names.
      points:
        - label: Fume
          line: The SDS says metal fume fever can follow exposure to high concentrations of fumes.
        - label: Carcinogen listing
          line: The SDS lists nickel as IARC group 1 and as reasonably anticipated to be a human carcinogen. It gives no nickel amount for 2826MB alone.
        - label: Edges
          line: The SDS says to take care with items that are sharp or heavy.
    - title: If the ribbon burns or is heated
      level: 2
      verdict: Toxic vapour in fire
      lead: The SDS says there is no specific fire or explosion hazard, but decomposition products may include metal oxides and toxic vapour.
      points:
        - label: Fire
          line: The SDS says the product has no specific fire or explosion hazard and may give off toxic vapour in a fire.
        - label: Heating
          line: The bulletin prints a crystallization temperature of 410 °C and does not say what happens to the ribbon above it.
    - title: Handling and storage
      verdict: Keep dry and clear of corrosives
      points:
        - label: Storage
          line: The SDS says to store the product under local regulations and to keep it clear of moisture and corrosive material.
        - label: Incompatibility
          line: The SDS lists moisture and corrosive material as incompatible.
  why: METGLAS 2826MB is a nickel-based amorphous metal ribbon from Metglas, Inc. It has no crystal lattice, and the manufacturer lists it for field sensors, shielding, high-frequency cores and magnetomechanical sensors. The bulletin gives a saturation induction of 0.88 T. No space flight or space-environment data for this grade were found in the sources read. Wikipedia's amorphous metal article notes the Metglas family of iron, nickel and boron alloys went into low-loss power distribution transformers; that history is for the family, not this grade.
  uses:
    - where: Field sensors
      line: The bulletin lists field sensors as an application of 2826MB, with a saturation induction of 0.88 T.
    - where: Magnetic shielding
      line: The product page lists shielding applications for 2826MB. The page gives no shield test data for this grade.
    - where: High-frequency cores
      line: The bulletin lists high frequency cores as an application of 2826MB.
  can_do:
    - label: Saturation induction
      benchmark: saturation_induction
      value: 0.88 T
      line: The bulletin gives a saturation induction of 0.88 T for 2826MB.
    - label: DC permeability
      benchmark: dc_permeability
      value: 800000 annealed; above 50000 as cast
      line: The bulletin gives a maximum DC permeability of 800,000 when annealed and above 50,000 as cast. The bulletin prints no unit for either value.
    - label: Continuous service
      benchmark: max_service_temp
      value: 125 °C
      line: The bulletin gives a continuous service temperature of 125 °C.
    - label: Density
      benchmark: density
      value: 7.90 g/cm3
      line: The bulletin gives a density of 7.90 g/cm3 for the ribbon.
  compare: The bulletin prints values for 2826MB only and gives no comparison table with other grades. The product page lists higher corrosion resistance and lower magnetostriction as benefits, but names no comparison alloys. The compare rows below therefore show the bulletin's own values for 2826MB, with no ranking against another grade.
  compare_rows:
    - label: Density
      benchmark: density
    - label: Saturation induction
      benchmark: saturation_induction
    - label: Curie temperature
      benchmark: curie_temperature
  handling:
    - Take care with sharp or heavy items, and wear personal protective equipment, as the SDS advises.
    - Keep the product clear of moisture and corrosive material, as the SDS advises for storage.
    - Keep fumes low when the ribbon is heated or processed, because metal fume fever can follow high concentrations.
  good_for:
    - Field sensors and high-frequency cores, the two uses the bulletin lists first.
    - 'Magnetic shielding where high permeability after annealing is needed: the bulletin gives 800000 DC permeability when annealed.'
  watch_out:
    - The bulletin is one manufacturer document dated 2011, and it prints no unit for permeability.
    - No corrosion rate was found. The SDS says moisture and corrosive material are incompatible with the product.
    - Composition is printed only as ranges for a six-alloy family, so the exact grade composition was not found.
  verdict: METGLAS 2826MB has a full manufacturer bulletin of magnetic and physical values, but its evidence rests on that one 2011 document and a product page. Corrosion, anneal temperature, composition and space behaviour are not documented in the sources read.