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Material:

Chemical Compositions

Type	Mark	Chemical composition （％）
Type	Mark	C	Si	Mn	P	S	Cr	Ni	Others	Impurities
Razor steel	TE2	1.20～1.30	0.15～0.35	0.35	0.03	≦0.020	0.30～0.50			Cu ≦0.25 Ni ≦0.25
ESR Steel	SK2ESR	1.20～1.30	≦0.20	≦0.35	≦0.025	≦0.020	0.30～0.50			Cu ≦0.25 Ni ≦0.25
ESR Steel	SK4ESR	0.90～1.00	≦0.35	≦0.50	≦0.025	≦0.020	0.15～0.30			Cu ≦0.25 Ni ≦0.25
Carbon tool steel JIS G 3311 -4401	SK4M	0.90～1.00	≦0.35	≦0.50	≦0.030	≦0.030				Cu ≦0.25 Ni ≦0.25 Cr ≦0.30
	SK5M	0.80～0.90	≦0.35	≦0.50	≦0.030	≦0.030
	SK6M	0.70～0.80	≦0.35	≦0.50	≦0.030	≦0.030
	SK7M	0.60～0.70	≦0.35	≦0.50	≦0.030	≦0.030
Alloy tool steel JIS G 3311-4404	SKS2M	1.00～1.10	≦0.35	≦0.80	≦0.030	≦0.030	0.50～1.00		W1.00～1.50	Cu ≦0.25 Ni ≦0.25
	SKS5M	0.75～0.85	≦0.35	≦0.50	≦0.030	≦0.030	0.20～0.50	0.70～ 1.30
	SKS51M	0.75～0.85	≦0.35	≦0.50	≦0.030	≦0.030	0.20～0.50	1.30～ 2.00
	SKS7M	1.10～1.20	≦0.35	≦0.50	≦0.030	≦0.030	0.20～0.50		W2.00～2.50
Carbon steel JIS G 3311 -4051	S70CM	0.65～0.75	0.15～0.35	0.60～0.90	≦0.030	≦0.035				Cu ≦0.30 Ni ≦0.20 Cr ≦0.20 S55C～S35C Ni+Cr ≦0.35
	S60CM	0.55～0.65	0.15～0.35	0.60～0.90	≦0.030	≦0.035
	S55CM	0.52～0.58	0.15～0.35	0.60～0.90	≦0.030	≦0.035
	S50CM	0.47～0.53	0.15～0.35	0.60～0.90	≦0.030	≦0.035
	S45CM	0.42～0.48	0.15～0.35	0.60～0.90	≦0.030	≦0.035
	S35CM	0.32～0.38	0.15～0.35	0.60～0.90	≦0.030	≦0.035
Austeniet Series	SUS 301	0.15	1.00	2.00	0.045	0.03	16.00 ~ 18.00	6.00 ~ 8.00
Austeniet Series	SUS 304	0.08	1.00	2.00	0.045	0.03	18.00~ 20.00	8.00 ~10.50
Martensite Series	SUS420J2	0.26~0.40	1.00	1.00	0.04	0.03	12.00~ 14.00
Martensite Series	RB-S	0.58~0.70	1.00≧	1.00≧	0.04≧	0.015≧	12.50~14.50

[ Notes ] M stands for cold rolled special steel strip of JIS (As bellow we will abbreviate by M)