Common Martensitic Grades

Common Martensitic Stainless Steel Grades

Common Name UNS # Forms Available C Cr Ni Mo Ti Other Typical Applications
410 ………………….. S41000 Bars ……………….. 0.1 12.5 General purpose grade for use in mildly corrosive environments.
416 S41600 Bars 0.1 12.5 0.20S Free machining variation of 410.
420 S42000 Bars 0.25 12.5 General engineering uses, such as pump and valve shafts.
420C Sheet, Coil, Plate & Bars 0.3 12.5 Developed for high hardness after heat treatment. Used for cutting tools, surgical knives, etc.
431 S43100 Bars 0.18 16 2 Hardenable steel with corrosion resistance approaching 302. Used for pump shafts etc. Should be double tempered after hardening.
440C S44004 Bars 4.1 17 0.4 Capable of being hardened to 60 Rc. Highest hardness and abrasion resistance of all the stainless steels. Corrosion resistance similar to 410.

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