M-50
Applications :
M-50 is widely used in bearings and bearing components in missile and aircraft applications where high wear resistance and strength at temperatures up to 800°F (427°C) is required.

Features:
M-50 is produced by a combination of vacuum induction melting and consumable electrode remelting. This alloy has excellent resistance to softening at high service temperatures. M-50 also has a good degree of oxidation resistance and features the high compressive strength characteristics of high-speed tool steels.

Features:
52100 bearing steel is a moderately deep hardening alloy having high resistance to wear, medium toughness and low resistance to softening at high temperatures. With proper heat treatment, 52100 has excellent stability in the hardened condition.

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Specialty Steel Balls Chart