Carbon Steel Seamless Pipe Q345
1: Material: 20#, 45#, 10#, 16Mn, 45Mn2, 37Mn5, 27SiMn, 30CrMo, 12CrMo, Q195, Q235, Q345...
2: Chemical composition:
| Q345A | C≤0.2 | Mn≤1.70 | Si≤0.5 | P≤0.035 | S≤0.035 | -- | Nb≤0.07 | V≤0.15 | Ti≤0.20 | Cr≤0.30 | Ni≤0.012 | Mo≤0.10 |
| Q345B | C≤0.2 | Mn≤1.70 | Si≤0.5 | P≤0.035 | S≤0.035 | -- | Nb≤0.07 | V≤0.15 | Ti≤0.20 | Cr≤0.30 | Ni≤0.012 | Mo≤0.10 |
| Q345C | C≤0.2 | Mn≤1.70 | Si≤0.5 | P≤0.030 | S≤0.030 | Al≥0.015 | Nb≤0.07 | V≤0.15 | Ti≤0.20 | Cr≤0.30 | Ni≤0.012 | Mo≤0.10 |
| Q345D | C≤0.18 | Mn≤1.70 | Si≤0.5 | P≤0.030 | S≤0.025 | Al≥0.015 | Nb≤0.07 | V≤0.15 | Ti≤0.20 | Cr≤0.30 | Ni≤0.012 | Mo≤0.10 |
| Q345E | C≤0.18 | Mn≤1.70 | Si≤0.5 | P≤0.025 | S≤0.020 | Al≥0.015 | Nb≤0.07 | V≤0.15 | Ti≤0.20 | Cr≤0.30 | Ni≤0.012 | Mo≤0.10 |
3: Mechanical Property:
| tensile strength | yield strength | elongation | |
| Q345A | 490-675 | ≥345 | ≥21 |
| Q345B | 490-675 | ≥345 | ≥21 |
| Q345C | 490-675 | ≥345 | ≥22 |
| Q345D | 490-675 | ≥345 | ≥22 |
| Q345E | 490-675 | ≥345 | ≥22 |

