牌号	化学成份 %
牌号	C	Si	Mn	P	S	Cr	Ni	Cu
65Mn	0.62-0.70	0.17-0.37	0.90-1.20	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25
55Si2Mn	0.52-0.60	1.50-2.00	0.60-0.90	≤0.035	≤0.035	≤0.035	≤0.035	≤0.25
60Si2Mn	0.56-0.64			≤0.035	≤0.035	≤0.035	≤0.035	≤0.25
65Si2Mn	0.56-0.64			≤0.030	≤0.030	≤0.035	≤0.035	≤0.25