... for light to medium stressed components and shafts requiring high surface wear resistance with reasonable ... . Typical uses are: Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons Pins ... 220HJIS SNCM 21 , JIS SNCM 21 HU.S.A. SAE 8620 AISI 8620ASTM A29/A29M 1991 ... A331 , ASTM A505 , ASTM A513 ,MIL SPEC MIL-S-16974 ,SAE J404 , SAE J770 ,UNS G86200France: AFNOR ...