Recently a lot of clients consult us about ASTM A572/A572M Grade 50 low alloy steel. And some are also interested in its equivelent material and want to know their difference as well.
The equivalent grade for A572GR.50 low alloy/mild steel is Q345B. It is also well known by more and more foreign clients, and exported in large quantity.
Below is chemical compasition and mechanical properties comparison between mild steel A572Gr.50 and Q345B steel plates for your reference:
A572Gr.50 steel Chemical composition:
Chemical composition |
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Grade |
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
N |
Mo |
|
A572 Gr.50 |
≦0.23 |
≦0.40 |
≦1.35 |
≦0.035 |
≦0.035 |
0.005-0.05 |
0.01-0.15 |
0.006-0.04 |
- |
0 |
- |
0.003-0.015 |
- |
|
Q345B |
≦0.20 |
≦0.50 |
≦1.70 |
≦0.035 |
≦0.035 |
≦0.07 |
≦0.15 |
≦0.20 |
≦0.30 |
≦0.50 |
≦0.30 |
≦0.012 |
≦0.10 |
A572Gr.50 steel Mechanical properties:
Grade |
Yield Strength |
Tensile Strength |
Elongation |
|
(Mpa) |
(MPa) |
(%) |
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|
A572 Gr.50 |
≧345 |
≧450 |
≧18 |
|
Q345B |
≧315 |
470-630 |
≧19 |
A572Gr50 and Q345B Low alloy and high strength structural steel plates are widely used in engineering structures, such as building steel structure, construction machinery, mining machinery, trucks, bridge, pressure vessel, etc. They are especially applied in building and engineering machinery parts which with better weldability and toughness. If you have such demands, welcome to contact us freely.
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
