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
