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牌號

厚度mm

C

Si

Mn

P

S

SM400A

≤50

≤0.23

—

≥2.5*C

≤0.035

≤0.035

50-200

≤0.25

SM400B

≤50

≤0.20

≤0.35

0.60-1.40

≤0.035

≤0.035

50-200

≤0.22

SM400C

≤100

≤0.18

≤0.35

≤1.40

≤0.035

≤0.035

牌號

屈服強度MPa

抗拉強度MPa

伸長率

鋼板的厚度mm

鋼板的厚度mm

鋼板的厚度mm

A%

≤16

16-40

40-75

75-100

100-160

160-200

≤100

100-200

SM400A

≥245

≥235

≥215

≥215

≥205

≥195

400-510

400-510

≤5

≥23

SM400B

≥245

≥235

≥215

≥215

≥205

≥195

5-16

≥18

SM400C

≥245

≥235

≥215

≥215

—

—

16-50

≥22

＞40

≥24