Address:Zhengzhou city in China.
Phone:0086-371-86151827
Email:
Q345 steel Introduction:
GB/T1591 Q345 steel belongs to 16Mn steel grade, usually it is produced in hot rolled state, hot rolled steel plate, hot rolled steel coil/sheet.
Q345 is low alloy structural steel with good mechanical properties, low temperature performance, plasticity and good weld ability. Yield point of Q345 steel plate decreases as plate thickness increases.
Q345 Steel Chemical Composition:
| Chemistry composition: % | C | Si | Mn | P | S | V | Nb | Al | Ti |
| Q345A | ≤ 0.20 | ≤ 0.55 | 1.00-1.60 | ≤ 0.045 | ≤ 0.045 | 0.02-0.15 | 0.015-0.060 | - | 0.02-0.20 |
| Q345B | ≤ 0.20 | ≤ 0.55 | 1.00-1.60 | ≤ 0.040 | ≤ 0.040 | 0.02-0.15 | 0.015-0.060 | - | 0.02-0.20 |
| Q345C | ≤ 0.20 | ≤ 0.55 | 1.00-1.60 | ≤ 0.035 | ≤ 0.035 | 0.02-0.15 | 0.015-0.060 | ≥ 0.015 | 0.02-0.20 |
| Q345D | ≤ 0.18 | ≤ 0.55 | 1.00-1.60 | ≤ 0.030 | ≤ 0.030 | 0.02-0.15 | 0.015-0.060 | ≥ 0.015 | 0.02-0.20 |
| Q345E | ≤ 0.18 | ≤ 0.55 | 1.00-1.60 | ≤ 0.025 | ≤ 0.025 | 0.02-0.15 | 0.015-0.060 | ≥ 0.015 | 0.02-0.20 |
Q345 Steel Mechanical Property:
| Mechanical Property | thickness | Test temperature(c) | Elongation (%) | proof stress(Mpa) | Tensile strenth(Mpa) |
| Q345A | ≤ 16 | - | 21 | 345 | 470-630 |
| Q345B | ≤ 16 | 20 | 21 | 345 | 470-630 |
| Q345C | 16-35 | 0 | 22 | ≥ 325 | 470-630 |
| Q345D | 35-50 | -20 | 22 | ≥ 295 | 470-630 |
| Q345E | 50-100 | -40 | 22 | ≥ 275 | 470-630 |
Q345 steel is widely used as welding structural part in manufacturing of ship, railway and vehicles, bridges, boiler, pressure vessel container, steel oil tank, etc.
Address: Zhengzhou city in China.
Phone: 0086-371-86151827
Email: 
