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1）Materials: AISI 440, AISI 440C
2）Diameters: 0.5mm - 50.8mm (2")
3）Grades: G10, G16, G25, G40, G100, G200, G500
4）Hardness: HRC 58-65
5）Certificate: ISO9001:2008, ISO14001:2004, ISO/TS16949:2009,RoHS
6）Features: AISI 440 and 440C Stainless Steel Balls are Microstructure of a martensitic steel, the production process requirement is higher. The heat treatment process is more complicated. AISI 440C Stainless Steel Ball is the most hard one in stainless steel balls. Its hardness is close to the bearing steel ball, but the latter is more easy to rust and corrode. It offers the maximum in materials strength and fair corrosion resistance. They resist alcohol, good environments, fresh waters, many petroleum products, organic materials and steam.
7）Applications: AISI 440 and AISI 440C stainless steel balls are used in bearings, valves, locking mechanisms, fasteners, quick-disconnect coupling, aviation, aerospace, motors, high precision instruments, oil, etc.

440C Stainless Steel Ball Chemical Composition %
C  0.95--1.20
Si  1.00MAX
Mn  1.00MAX
P  0.04MAX
S  0.02MAX
Cr  16.00--18.00
Mo  0.40-0.80