AISI 410 Martensitic Stainless Steel: Hardenable 12% Cr Grade
ASTM A240/A276 · Updated: 2026-05-25
AISI 410 is a martensitic stainless steel with 11.5-13.5% chromium that can be hardened by heat treatment—unlike 304/316 which only work-harden. In the quenched and tempered condition at 28-35 HRC, it provides an excellent combination of strength, toughness, and moderate corrosion resistance. Used for pump shafts, valve components, steam turbine blades, cutlery, and fasteners where both mechanical properties and corrosion resistance are needed. The annealing temperature is 815-900°C with slow furnace cooling; hardening requires austenitizing at 925-1010°C followed by oil or air quenching.
Quick Facts
| Category | Stainless Steel |
| Standard | ASTM A240/A276 |
| Density | 7.70 g/cm³ |
| Yield Strength | 275 MPa (40 ksi) annealed; 720 MPa (104 ksi) Q&T |
| Tensile Strength | 480 MPa (70 ksi) annealed; 830 MPa (120 ksi) Q&T |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| EN 1.4006 | Compare |
| X12Cr13 | Compare |
| SUS410 | Compare |
| 12Cr13 | Compare |
| AISI 410 | Compare |
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Frequently Asked Questions
Can 410 stainless be welded?
Yes, but with significant precautions. 410 hardens during air cooling from welding temperatures, creating brittle martensite in the HAZ. Preheat to 200-320°C, use E/ER410 filler metal, maintain interpass temperature, and cool slowly in vermiculite or a furnace. Post-weld heat treatment (anneal or temper) is essential to restore ductility. For critical applications, consider 410NiMo (EN 1.4313) filler for improved as-welded toughness.