Oil quenched from 845°C, 540°C temper, 100 mm round. Post Oil quenched hardness 35 HRC surface, 29 HRC half-radius, 20 HRC center |
B.S. 530 A 40, B.S. 530 H 40, B.S. 530 M 40, B.S. 2 S 117, DIN 1.7035, AFNOR 42 C 4 (Fr), UNI 40 Cr 4 (Ital.), UNI 41 Cr 4 KB (Ital.), JIS SCr 4 H (Japan.), UNS G51400, ASTM A322, ASTM A331, ASTM A505, ASTM A519, SAE J404, SAE J412, SAE J770 |