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AISI 440C

Chemical Analysis
C	.95 - 1.2
MN	1.00 max
P	.040 max
S	.303 max
Si	1.00 max
Cr	16.0 -18.0
Ni
Mo	.75 max
Cu
Co
Fe	bal
W
Sn

AISI 440C is a high-carbon chromium steel designed to provide stainless properties with maximum hardness. It has been used primarily as a bearing steel, and is used in the hardened plus tempered condition. When heat-treated, Type 440C attains the highest hardness of any stainless steel (about Rockwell C 60).

Typical applications are bearing assemblies, including bearing balls and races. In addition, it should be considered for cutlery, needle valves, ball check valves, valve seats, pump parts, ball studs, bushings, and wear-resistant textile components

Available forms of AISI 440C are seamless tube, round bar, forgings and plate