440 stainless steel is martensitic stainless steel, 440 has a good high temperature dimensional temperature, can be used as corrosion-resistant high-temperature bearing steel.

　　In addition, it can also be used to make high-quality tools, such as medical scalpels, scissors, nozzles, bearings and so on.

　　The most common grade in 440 series is 440C.

　　Chemical composition:

　　The 440C has the highest hardness of all stainless steels and heat-resistant steels. For nozzles, bearings. 440F: Steel grades that improve the easy-cutting properties of 440C steel.

　　For automatic lathes. Martensitic stainless steels have the same properties as ordinary alloy steels that are hardened by quenching, so a wide range of different mechanical properties can be obtained by selecting grades and heat treatment conditions.

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