Annealed, heated to 830°C, furnace cooled 11°C per hour to 650°C (1200°F), air cooled, 25 mm round |
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 |