详细介绍:
型钢的牌号和化学成分
牌号
|
化学成分(质量分数)(%)
|
C
|
Si
|
Mn
|
V
|
P
|
S
|
≤
|
16MnK
|
0.12"-' 0.20
|
0.20"-'0.55
|
1.20"-'1.60
|
|
0.045
|
0.045
|
20MnK
|
0.15"-' 0.26
|
0.20"-'0.60
|
1.20"-'1.60
|
|
0.050
|
0.050
|
25MnK
|
0.21"-' 0.31
|
0.20"-'0.60
|
1.20"-'1.60
|
|
0.050
|
0.050
|
20MnVK
|
0.17"-' 0.24
|
0.17"-'0.37
|
1.20"-'1.60
|
0.07"-'0.20
|
0.045
|
0.045
|
25MnVK
|
0.22"-' 0.30
|
0.50"-'0.90
|
1.30"-'1.60
|
0.06"-'0.13
|
0.050
|
0.050
|
型钢的力学和工艺性能
牌号
|
屈服点 s/MPa
|
抗拉强度 h/MPa
|
伸长率 (%)
|
冷弯180° d=弯心直径 a=试样厚度
|
≥
|
16MnK
|
325
|
490
|
21
|
d=3a
|
20MnK
|
335
|
490
|
16
|
25MnK
|
335
|
520
|
16
|
20MnVK
|
390
|
570
|
14
|
25NnVK
|
490
|
635
|
18
|
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|