440C (UNS S44004) is one kind of martensitic stainless steels that are optimized for high hardness, and other properties are to some degree compromised. Fabrication must be by methods that allow for poor weldability and usually also allow for a final harden and temper heat treatment. And the corrosion resistance of 440C (UNS S44004) is lower than the common austenitic grades.This grade is commonly used in cutlery and food processing applications.
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