Martensitic Stainless Steels
These are magnetic, hard enable by heat treatment, with moderate corrosion resistance and high strength. Ideal for cutlery, tools, and valves.
| Grade | UNS Designation | W. Nr. | Key Properties |
|---|---|---|---|
| 410/410S | S41000 | 1.4006, 1.4000 | General-purpose, heat-treatable, good hardness. |
| 420 | S42000 | 1.4021 | Higher carbon for better hardness and wear resistance. |
| 431 | S43100 | 1.4057 | Nickel addition for improved toughness. |
| 440C | S44004 | 1.4125 | High carbon for maximum hardness and corrosion resistance. |
For full chemical compositions, mechanical properties, heat treatments, and certifications, download our data sheets (linked per grade). Additional grades available on request.
Industries & Applications
- Chemical & Petrochemical
- Marine & Offshore
- Food & Beverage
- Aerospace & Defense
- Construction & Architecture