Hardened & Tempered Steel Strips

Hardened & Tempered Spring Steel Materials

Grades	C %	Mn %	Si % (Max)	S % (Max)	P % (Max)
C 55	0.50-0.60	0.60-0.90	0.35	0.025	0.035
C 65	0.60-0.70	0.60-0.90	0.35	0.025	0.035
C 75	0.70-0.80	0.60-0.90	0.35	0.025	0.035
C 80	0.75-0.85	0.60-0.90	0.35	0.025	0.035

International Cross Reference

USA SAE/AISI	Germany DIN 17222	Euronorm EN 10132	Great Britain BS 1449	United Kingdom BS 970	Japan JIS	India IS 2507	Russia GOST
1055	CK 55	C55S	—	EN 9	S55C	S55C 6	S5
1060	CK 60	C60S	CS 60	—	S60C / SUP11A	—	60
1065	—	—	—	EN 42F	S65C / SK7	S65C 6	65
1070	CK 67	C67S	CS 70	—	S70C	S70C 6	70
1074/1075	CK 75	C75S	—	EN 42J	S75C / SK6 / SUP3	S75C 6	75
1080	—	—	CS 80	—	—	S80C 6	—