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牌号表示方法
Q390是高强度结构钢板相同材质：Q420.Q460.Q500.Q550.Q690.Q890.Q980.
化学成分 【化学成分】（质量分数）（%）
等级
|
C
|
Mn
|
Si
|
P
|
S
|
V
|
Nb
|
Ti
|
Al
|
Cr
|
Ni
|
A
|
≤0.20
|
1.00～1.60
|
≤0.55
|
≤0.045
|
≤0.045
|
0.02～0.20
|
0.015～0.060
|
0.02～0.20
|
-
|
≤0.30
|
≤0.70
|
B
|
≤0.20
|
1.00～1.60
|
≤0.55
|
≤0.040
|
≤0.040
|
0.02～0.20
|
0.015～0.060
|
0.02～0.20
|
-
|
≤0.30
|
≤0.70
|
C
|
≤0.20
|
1.00～1.60
|
≤0.55
|
≤0.035
|
≤0.035
|
0.02～0.20
|
0.015～0.060
|
0.02～0.20
|
≥0.015
|
≤0.30
|
≤0.70
|
D
|
≤0.20
|
1.00～1.60
|
≤0.55
|
≤0.030
|
≤0.030
|
0.02～0.20
|
0.015～0.060
|
0.02～0.20
|
≥0.015
|
≤0.30
|
≤0.70
|
E
|
≤0.20
|
1.00～1.60
|
≤0.55
|
≤0.025
|
≤0.025
|
0.02～0.20
|
0.015～0.060
|
0.02～0.20
|
≥0.015
|
≤0.30
|
≤0.70
|
|
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