Q345 Steel: Q345A Q345B Q345C Q345D Q345E Equivalent & Properties
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Family: Structural Steel
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| B | – |
| C | 0.020 |
| N | 0.012 |
| P | 0.035 |
| S | 0.035 |
| V | 0.15 |
| Cr | 0.30 |
| Cu | 0.30 |
| Mn | 1.70 |
| Mo | 0.10 |
| Nb | 0.07 |
| Ni | 0.50 |
| Si | 0.025 |
| Ti | 0.20 |
| Al, ≥ | – |
| Quality Grade | 0.025 |
| Grade (steel number) | S355J2 (1.0553), S355K2 (1.0596), S355J2G4 (1.0577), S355K2G3 (1.0595), S355K2G4 (1.0596) |
| Grade: Imperial (SI) | 50W(350W) |
Where to Buy Q345 Steel: Q345A Q345B Q345C Q345D Q345E Equivalent & Properties
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Description
Q345 steel is a Chinese standard low alloy high strength structural steel. The material has a minimum yield strength of 345 MPa (50 ksi), and tensile strength of 470-630 Mpa (68-91 ksi). It has better properties than Q235. According to GB/T 1591 – 2008, Q345 material has 5 quality grades: Q345A, Q345B, Q345C, Q345D and Q345E. Q345, Q345A, Q345B, Q345C, Q345D and Q345E steel properties, datasheet and specification are listed in the tables below, including chemical composition, physical and machenical properties, etc. Chemical Composition Based on melting analysis.