Q355 Steel: Q355B Q355C Q355D Properties & Equivalent
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Family: Structural Steel
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| C | 0.025 |
| N | 0.012 |
| P | 0.035 |
| S | 0.035 |
| V | 0.01-0.10 |
| Cr | 0.30 |
| Cu | 0.40 |
| Mn | 0.90-1.65 |
| Nb | 0.01-0.05 |
| Ni | 0.30 |
| Si | 0.025 |
| Ti | 0.006-0.05 |
| C, ≤ | 0.010 |
| N, ≤ | 0.015 |
| P, ≤ | 0.035 |
| S, ≤ | 0.035 |
| Al, ≥ | 0.015 |
| Cr, ≤ | 0.30 |
| Cu, ≤ | 0.40 |
| Mn, ≤ | 1.60 |
| Mo, ≤ | 0.10 |
| Ni, ≤ | 0.50 |
| Si, ≤ | 0.5 |
| Quality Grade | 0.020 |
| Grade (Material Number) | S355, S355JR (1.0045) |
| Grade – SI (Imperial) | 350W (50W); 345WM (50WM) |
Where to Buy Q355 Steel: Q355B Q355C Q355D Properties & Equivalent
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Description
Q355 steel is a low alloy high strength structural steel commonly used in China, which replaced Q345. The material has a minimum yield strength of 355 MPa (51 ksi) and a tensile strength of 470-630 Mpa (68-91 ksi). According to GB/T 1591 -2018, Q355 has 3 steel grades: Q355AR, Q355M and Q355N, and these steel grades are indicated by the suffix letters B, C, D, E, F for quality grades. Q355M: Q355MB, Q355MC, Q355MD, Q355ME, Q355MF