**號

化 學 成 份 %

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