
| Main chemical elements composition of A204 Grade A | ||||||
| Thickness(mm) | C | Si | Mn | P | S | Mo | 
| T≤25 | 0.18 | 0.15-0.40 | 0.90 | 0.035 | 0.035 | 0.45-0.60 | 
| 25 T≤50 | 0.21 | |||||
| 50 T≤100 | 0.23 | |||||
| T>100 | 0.25 | |||||
| Yield strength (≥Mpa) | Tensile strength (Mpa) | Elongation in ≥,% | |
| 255 | 450-585 | 200mm | 50mm | 
| 19 | 23 | ||