ASTM A131 steel plates are mainly used in ship construction and are widely used in the Marine industry. ASTM A131 specification covers the main steel grades: Grade A, Grade B, Grade D, Grade E, ABS Grade AH36 DH36 EH36. These steel grades have different applications and characteristics in ship construction.
Chemical and Mechanical Requirements-ABS Grade AH36 DH36 EH36
Carbon Equivalent-ABS Grade AH36 DH36 EH36
| GRADE | AH36 | AH36 | DH36 | DH36 | EH36 | EH36 |
| Thickness (in) | 0.1875 – 2.00 | 2.001 – 3.00 | 0.1875 – 2.00 | 2.001 – 3.00 | 0.1875 – 2.00 | 2.001 – 3.00 |
| CEV(max %) | 0.38 | 0.4 | 0.38 | 0.4 | 0.38 | 0.4 |
Carbon equivalent requirements for TMCP condition of supply only.
1. The general grades A, B, D, and E are distinguished according to the impact temperature of the steel. The impact values of all grades of steel are the same.
2. High-intensity hull structure steel preheating requirements: For all AH, DH, EH plate thickness greater than 30mm angle, butt joints, shall be preheating to 120 ~ 150°C before welding.
3. For thickness of the plate ≤ 30mm, the ambient temperature is below 5°C, preheated to 75°C; Ambient temperature below 0°C, preheated to 75 ~ 100°C.
