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鋼級

Standard

牌號

Steel Grade

化學成分Chemical Composition（%）

C

Si

Mn

P

S

JIS G3445

STKM11A

≤0.12

≤0.35

≤0.60

≤0.04

≤0.04

STKM12A

≤0.20

≤0.35

≤0.60

≤0.04

≤0.04

STKM11B

STKM11C

STKM13A

≤0.25

≤0.35

0.30~0.90

≤0.04

≤0.04

STKM13B

STKM13C

STKM14A

≤0.30

≤0.35

0.30~1.00

≤0.04

≤0.04

STKM14B

STKM14C