GB Q345/ASTM A572 Gr50 Alloy Structural Steel Square Bar
Place of Origin:Hebei,China Brand Name:Haihao Group
Shape:square bar Material:Alloy Structural Steel
Steel Grade: ATSM A572 Gr50/GB 16Mn/GB Q345
Size:Diameter:10mm~300mm
Application:widely used in construction and project structure, also used in making rebar, house frame, pylon, bridge, cars, container etc.
Chemical composition
| C | Mn | Si | P | S | Al | V | Ti | Cr | Mo | |
| Q345A | ≤0.20 | ≤1.70 | ≤0.50 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.10 | |
| Q345B | ≤0.20 | ≤1.70 | ≤0.50 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.10 | |
| Q345C | ≤0.20 | ≤1.70 | ≤0.50 | ≤0.30 | ≤0.030 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.10 | ≤0.10 |
| Q345D | ≤0.18 | ≤1.70 | ≤0.50 | ≤0.30 | ≤0.025 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.10 |
| Q345E | ≤0.18 | ≤1.70 | ≤0.50 | ≤0.25 | ≤0.020 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.30 | ≤0.10 |
