Atmospheric corrosion resistant steel for bridges product
Main grades: Q345qNH, Q370qNH, Q420qNH, Q460qNH, Q500qNH, Q550qNH
Standard: GB/T714
The atmospheric corrosion-resistant steel series (Q345qNH, Q370qNH, Q420qNH, Q460qNH, Q500qNH, Q550qNH) for bridges are mainly used in bridge construction projects. Due to the addition of corrosion-resistant Cu, Ni and other alloy elements, it has superior atmospheric corrosion resistance compared to ordinary bridge steels.
Bridge steel plates and sheets specification
|
Grade |
Quality level |
Size/mm |
|
|
|
Coil sheet |
Medium plate |
|
Q345qNH |
D
E
F |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q370qNH |
|
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q420qNH |
|
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q460qNH |
|
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q500qNH |
|
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q550qNH |
|
1.5-19×800-1600 |
6-50×1600-3250 |
Product analysis
|
Grades |
Composition/% |
|
C |
Si |
Mn |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
Mo |
N |
Als |
|
Q345qNH |
≤0.11 |
0.15
~
0.50 |
1.10
~
1.50 |
0.01
~
0.10 |
0.01
~
0.10 |
0.006
~
0.030 |
0.40
~
0.70 |
0.30
~
0.40 |
0.25
~
0.50 |
≤0.10 |
≤0.008 |
0.015
~
0.050 |
|
Q370qNH |
≤0.15 |
|
Q420qNH |
≤0.20 |
|
Q460qNH |
|
Q500qNH |
0.45
~
0.70 |
0.30
~
0.45 |
0.25
~
0.55 |
≤0.25 |
|
Q550qNH |
As a leading supplier of atmospheric corrosion resistance steel products, Katalor Industry is able to supply high quality hot tolled and cold rolled Q345qNH plates, Q370qNH, Q420qNH steel sheet, Q460qNH steel coils, Q500qNH, Q550qNH steel sections for bridges, railways, vehicles, containers, buildings, towers or other structural parts, etc.
