等级
|
C
|
Si
|
Mn
|
P
|
S
|
Mo
|
Cr
|
Ni
|
B
|
A
|
≤0.25
|
≤0.70
|
≤1.60
|
≤0.025
|
≤0.010
|
≤0.50
|
≤1.40
|
|
≤0.004
|
B
|
≤0.25
|
≤0.70
|
≤1.60
|
≤0.025
|
≤0.010
|
≤0.50
|
≤1.00
|
≤1.00
|
≤0.004
|
商标
|
厚度
|
抗拉强度
|
延伸率
|
-20°C冲击功(纵向)AKV/J
|
布氏硬度
HBW
|
冷弯
|
WNM500A
|
6~60
|
-
|
-
|
≥24
|
480~525
|
试样宽度B=30MM弯曲角度180°弯心直径
|