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標(biāo)準(zhǔn)

牌號(hào)

化學(xué)成分（％）

C

Si

Mn

P

S

Cr

Mo

Cu

Ni

V

Al

W

Ti

Nb

N

GB3087

10

0.07～0.13

0.17～0.37

0.38～0.65

≤0.030

≤0.030

0.3～0.65

/

≤0.25

≤0.30

/

/

20

0.17～0.23

0.17～0.37

0.38～0.65

≤0.030

≤0.030

0.3～0.65

/

≤0.25

≤0.30

/

/

GB5310

20G

0.17～0.24

0.17～0.37

0.35～0.65

≤0.030

≤0.030

≤0.25

≤0.15

≤0.20

≤0.25

≤0.08

20MnG

0.17～0.24

0.17～0.37

0.70～<SPAN, lang=EN-US style="FONT-SIZE: 9pt; COLOR: black;, , ms