文档介绍：优质碳素结构钢的牌号及化学成分(摘自GB/T699—1999)
牌号
化学成分(质量分数),%
C(碳)
Si(硅)
Mn(锰)
P(磷)
S(磷)
Cr(铬)
Ni(镍)
08F
~
≤
~
≤
≤
≤
≤
08
~
~
~
≤
≤
≤
≤
10F
~
≤
~
≤
≤
≤
≤
10
~
~
~
≤
≤
≤
≤
15F
~
≤
~
≤
≤
≤
≤
15
~
~
~
≤
≤
≤
≤
20
~
~
~
≤
≤
≤
≤
25
~
~
~
≤
≤
≤
≤
30
~
~
~
≤
≤
≤
≤
35
~
~
~
≤
≤
≤
≤
40
~
~
~
≤
≤
≤
≤
45
~
~
~
≤
≤
≤
≤
50
~
~
~
≤
≤
≤
≤
55
~
~
~
≤
≤
≤
≤
60
~
~
~
≤
≤
≤
≤
65
~
~
~
≤
≤
≤
≤
70
~
~
~
≤
≤
≤
≤
75
~
~
~
≤
≤
≤
≤
80
~
~
~
≤
≤
≤
≤
85
~
~
~
≤0