Steel Ferrium S53 SCT496
Precip hard
SCT496 = overaged 496–510 °C
Slightly softer aging used when fracture toughness is prioritized over peak strength.
Values for the SCT496 condition
Other Ferrium S53 tempers and conditions
Ferrium S53 is listed in 4 conditions; see the grade overview at Ferrium S53.
- ANN
- SHT+Q
- SCT496
- AMS5922-SCT482
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Mill-supplied soft bar/forging for rough machining before final hardening. | 850 | 1,100 | 18 | 34 HRC | 2.4 % IACS |
Solution treated 1060–1090 °C, oil/gas quenched, cryogenic treated | Intermediate as-quenched martensite state — not a service condition; must be aged before use. | 1,100 | 1,500 | 10 | 47 HRC | 2.2 % IACS |
SCT496This page Overaged 496–510 °C | Slightly softer aging used when fracture toughness is prioritized over peak strength. | 1,520 | 1,860 | 13 | 51 HRC | 2.3 % IACS |
AMS5922-SCT482Default AMS 5922 | Standard qualified aerospace condition — ~285 ksi UTS with corrosion resistance; use for landing gear and actuator parts. | 1,620 | 1,985 | 12 | 54 HRC | — |
What is Ferrium S53 SCT496?
Ferrium S53 SCT496 is Ferrium S53 in the SCT496 condition — slightly softer aging used when fracture toughness is prioritized over peak strength. Ferrium S53 SCT496 has a yield strength of 1,520 MPa (220 ksi) and a tensile strength of 1,860 MPa (270 ksi) — stronger than 97% of steel grades. Elongation at break is 13% and the elastic modulus is 200 GPa (29 Msi). Ferrium S53 SCT496 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,400°C (2,552 °F). AMS5922-SCT482 is the default condition FabDigit quotes; SCT496 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 55/100, better than 99% of steel grades
- High strength — 1,520 MPa (220 ksi), better than 97% of steel grades
- Polishes to a fine finish — 80/100, better than 97% of steel grades
Limitations
- Poor heat conductor — 18 W/m·K (10.4 BTU/hr·ft·°F), worse than 98% of steel grades
- Difficult to machine — 20/100, worse than 97% of steel grades
- High embodied carbon — 5 kg CO₂/kg, worse than 96% of steel grades
- Limited formability — 11/100, worse than 93% of steel grades
- Limited ductility — 13%, worse than 78% of steel grades
Ferrium S53 SCT496 properties
Typical room-temperature values for Ferrium S53 SCT496; 22 are specific to this condition. Other listed values are Ferrium S53 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
Ferrium S53 SCT496 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,400°C (2,552 °F).
Mechanical15
Ferrium S53 SCT496 has a yield strength of 1,520 MPa (220 ksi) and a tensile strength of 1,860 MPa (270 ksi) — stronger than 97% of steel grades. Elongation at break is 13% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
Ferrium S53 SCT496 is rated for continuous service to 370°C (698 °F). It conducts heat at 18 W/m·K (10.4 BTU/hr·ft·°F), worse than 98% of steel grades. Thermal expansion is 11.5 µm/m·K (6.39 µin/in·°F).
Electrical2
Ferrium S53 SCT496 has an electrical resistivity of 7.5×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is good (55/100), better than 99% of steel grades.
Sustainability4
Producing a kilogram of Ferrium S53 SCT496 takes about 62 MJ of energy and emits 5 kg of CO₂ — more than 96% of steel grades. Typical recycled content is 15%.
Manufacturability6
Ferrium S53 SCT496's machinability is poor (20/100, worse than 97% of steel grades); weldability poor (25/100); formability not recommended (11/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ferrium S53 SCT496
Is Ferrium S53 easy to machine?
Rough machine in the annealed state; finish machining at 54 HRC needs rigid setups, ceramic or coated carbide tooling, low speeds and heavy coolant, or grinding/EDM with stress-relief afterwards.
Can Ferrium S53 be welded?
Not qualified for structural fusion welding — secondary-hardening martensite is crack- and HAZ-sensitive; repair only by approved laser cladding with full re-heat-treat.
Can Ferrium S53 be formed, bent or molded?
Hot forge 1050–1150 °C with controlled finish temperature and slow cool to the annealed state; no meaningful cold forming in the hardened condition.
What surface finishes work on Ferrium S53?
Designed to be used bare or primed/painted — no cadmium plating needed; avoid electroplating hydrogen-charging processes, and shot-peen plus passivation for maximum fatigue and corrosion life.
Ferrium S53 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| C | 0.19 – 0.23 | 0.21 |
| Co | 13 – 14.5 | 14 |
| Crprovides passivation without Cd plating | 9.5 – 10.5 | 10 |
| Ni | 5 – 5.75 | 5.5 |
| Mosecondary-hardening M2C carbides | 1.75 – 2.25 | 2 |
| W | 0.9 – 1.1 | 1 |
| V | 0.25 – 0.35 | 0.3 |
| Siresidual | ≤ 0.1 | — |
| Mnresidual | ≤ 0.1 | — |
| Presidual | ≤ 0.01 | — |
| Sresidual | ≤ 0.01 | — |
| Fe | balance | — |
Ferrium S53 SCT496 — frequently asked
What is Ferrium S53 SCT496 used for?
Ferrium S53 SCT496 is typically used for landing gear, arresting hooks and corrosion-critical structural parts. In short: cadmium-free landing gear steel; corrosion-resistant 280 ksi steel; 300M replacement grade.
What is the yield strength of Ferrium S53 SCT496?
Ferrium S53 SCT496 has a typical yield strength of 1,520 MPa (220 ksi) and a tensile strength of 1,860 MPa (270 ksi) — stronger than 97% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is Ferrium S53 SCT496 easy to machine?
Not especially — machinability is rated poor (20/100, worse than 97% of steel grades). Rough machine in the annealed state; finish machining at 54 HRC needs rigid setups, ceramic or coated carbide tooling, low speeds and heavy coolant, or grinding/EDM with stress-relief afterwards.
Can Ferrium S53 SCT496 be welded?
Not readily — weldability is rated poor (25/100). Not qualified for structural fusion welding — secondary-hardening martensite is crack- and HAZ-sensitive; repair only by approved laser cladding with full re-heat-treat.
What surface finishes work on Ferrium S53 SCT496?
Designed to be used bare or primed/painted — no cadmium plating needed; avoid electroplating hydrogen-charging processes, and shot-peen plus passivation for maximum fatigue and corrosion life.
Can Ferrium S53 SCT496 be formed, bent or molded?
Hot forge 1050–1150 °C with controlled finish temperature and slow cool to the annealed state; no meaningful cold forming in the hardened condition.
What is the maximum service temperature of Ferrium S53 SCT496?
Ferrium S53 SCT496 is rated for continuous use to about 370°C (698 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ferrium S53 AMS5922-SCT482 and Ferrium S53-ANN?
AMS5922-SCT482 is the default condition — standard qualified aerospace condition — ~285 ksi UTS with corrosion resistance; use for landing gear and actuator parts. ANN: mill-supplied soft bar/forging for rough machining before final hardening. Yield strength is 1,620 MPa in AMS5922-SCT482 versus 850 MPa in ANN.
Sources
- AMS 5922 — Steel, Corrosion-Resistant, Bars and Forgings, 10Cr-5.5Ni-14Co-2Mo, Vacuum Melted — SAE International (2020)
- Ferrium S53 alloy technical data — QuesTek Innovations LLC (2021)
- Ferrium S53 VIM-VAR bar product information — Carpenter Technology / Latrobe Specialty Metals (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- MMPDS-style ultra-high-strength steel comparison data (300M, AerMet 100, S53) — Battelle / FAA (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.