{ "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.\n", "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", "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" } ], "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)" }, "tags": { "environments": [], "stresses": [ "extreme-heat" ], "applications": [ "thermal-control" ] }, "properties": [ { "benchmark": "density", "label": "Density, Fecralloy foil and sheet", "value": 7.22, "bound": "exact", "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", "source_detail": { "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)" } }, { "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", "source_detail": { "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)" } }, { "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", "source_detail": { "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)" } }, { "benchmark": "electrical_resistivity", "label": "Electrical resistivity, Fecralloy", "value": 134, "bound": "exact", "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", "source_detail": { "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)" } }, { "benchmark": "curie_temperature", "label": "Curie temperature, Fecralloy", "value": 600, "bound": "exact", "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", "source_detail": { "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)" } }, { "benchmark": "thermal_conductivity", "label": "Thermal conductivity at 23 °C, Fecralloy", "value": 16, "bound": "exact", "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)", "source_detail": { "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)" } }, { "benchmark": "cte", "label": "Coefficient of thermal expansion, 20 to 100 °C, Fecralloy", "value": 11.1, "bound": "exact", "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)", "source_detail": { "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)" } }, { "benchmark": "ultimate_tensile_strength", "label": "Tensile strength, Fecralloy foil and sheet, room temperature", "value": 560, "bound": "exact", "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", "source_detail": { "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)" } }, { "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", "source_detail": { "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)" } }, { "benchmark": "hardness_vickers", "label": "Hardness (Vickers), Fecralloy", "value": 230, "bound": "exact", "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", "source_detail": { "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)" } }, { "benchmark": "temperature_coefficient", "label": "Temperature coefficient, as printed", "value": 0.0001, "bound": "exact", "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", "source_detail": { "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)" } } ], "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." } ], "media": [], "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." ], "story": { "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", "line": "The maximum use temperature in air is printed as 1100 to 1300 °C. The page gives no test duration.", "benchmark": "max_service_temp", "scope": "material", "value": "1100 to 1300 °C" }, { "label": "Carry current as a heater", "line": "The electrical resistivity is 134 µΩ·cm. The page does not give the temperature for this value.", "benchmark": "electrical_resistivity", "scope": "material", "value": "134 µΩ·cm" }, { "label": "Stay solid when hot", "line": "The melting range is printed as 1380 to 1490 °C.", "benchmark": "melting_point", "scope": "material", "value": "1380 to 1490 °C" }, { "label": "Strength in foil", "line": "The tensile strength is 560 MPa for foil and sheet. The page does not state the temper.", "benchmark": "ultimate_tensile_strength", "scope": "material", "value": "560 MPa tensile" } ], "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", "scope": "material" }, { "label": "Max use temperature in air", "benchmark": "max_service_temp", "scope": "material" }, { "label": "Electrical resistivity", "benchmark": "electrical_resistivity", "scope": "material" } ], "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", "role": "The matrix of the alloy, a ferritic iron-chromium solid solution.", "share_percent": 72.8 }, { "name": "Chromium", "symbol": "Cr", "role": "Forms the chromium-rich part of the matrix and helps the alumina scale bond to the metal (Goodfellow).", "share_percent": 22 }, { "name": "Aluminium", "symbol": "Al", "role": "Forms the dense, adherent alumina (Al2O3) scale that protects the alloy in air (Goodfellow).", "share_percent": 5 }, { "name": "Yttrium", "symbol": "Y", "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 %.", "share_percent": 0.1 }, { "name": "Zirconium", "symbol": "Zr", "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 %.", "share_percent": 0.1 } ] }, "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.", "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." } ], "level": 1, "verdict": "No data read" }, { "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." } ] } ] }, "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." }, "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", "url": "https://spacemushroom.com/profiles/fecralloy/" }