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Martensitic Stainless Spec Table
Martensitic Stainless KS Specifications — 1 sizes
KS D 3705
Heat-hardenable stainless steel (SUS420, etc.) for wear-resistant parts: blades, dies, shafts, and valves.
Practical Notes
- SUS420 achieves HRC 50+ hardness via heat treatment. Suitable for wear-resistant parts: blades, dies, valves.
- Lower corrosion resistance than SUS304. In corrosive environments, prioritize corrosion resistance over hardness — consider SUS304/316.
KSMartensitic Stainless
1 sizes| Name | Type | Tensile | Yield | Hardness | Use |
|---|---|---|---|---|---|
| SUS410 | ≥440 | ≥205 | HB≤200 | , , Bolt |
Key Features
- STS410 (13Cr) / STS420 (13Cr-high C) / STS440C (17Cr-1C); heat-treatable to HRC 50–60
- Only stainless type that can be quench-hardened; corrosion resistance lower than 304
- Magnetic; suited for parts requiring both high hardness and moderate corrosion resistance
Key Applications
Knives/scissors, turbine blades, bearings, nozzles, medical surgical instruments
FAQ
What level is SUS420 corrosion resistance?
Lower than SUS430. Less chromium means rust is possible in humid environments. Use only where hardness and wear resistance take priority over corrosion resistance.