Martensitic alloys
Strengthen by heat treating
Fair corrosion resistance
410 is the basic martensitic alloy
- 420: increase C (0.15, minimum) to increase strength
- 440C: increase C (0.95-1.20) for high strength, hardness, and wear resistance
- 416: add P and S to improve machinability compared to 410
| SAE type | C | Mn | Si | Cr | Ni | |
| 410 | 0.15 max | 1.00 max | 1.00 max | 11.5 -13.0 | — | -Fair general corrosion resistance -High strength |