化学成份
牌号
|
C
|
Si
|
Mn
|
P
|
S
|
V
|
Nb
|
Al
|
Ti
|
Cr | Ni | Cu |
Q345A
|
≤0.20
|
≤0.50
|
≤1.70
|
≤0.035
|
≤0.035
|
≤0.15
|
≤0.07 |
-
|
≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 |
Q345B
|
≤0.20
|
≤0.50
|
≤1.70
|
≤0.035
|
0.035
|
≤0.15
|
≤0.07 |
-
|
≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 |
Q345C
|
≤0.20
|
≤0.50
|
≤1.70
|
≤0.030
|
≤0.030
|
≤0.15
|
≤0.07 |
≥0.015
|
≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 |
Q345D
|
0.18
|
≤0.50
|
≤1.70
|
≤0.030
|
≤0.025
|
≤0.15
|
≤0.07 |
≥0.015
|
≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 |
Q345E
|
≤0.18
|
≤0.50
|
≤1.70
|
≤0.025
|
≤0.020
|
≤0.15
|
≤0.07 |
≥0.015
|
≤0.20 | ≤0.30 | ≤0.50 | ≤0.30 |
屈服强度:≤16mm:大于345,16-40mm:大于335,40-63mm:大于325,63—80mm:大于315,
80—100m:大于305,100—150mm:大于285,150—200mm:大于275。
抗拉强度:450—630。
伸长率:大于17。
冲击试验:试验温度:20℃:大于34