Applications of LR Grade B Shipbuilding Steel in Conventional Shipbuilding and Coastal Offshore Engineering
- Jul 14, 2026
Knowledge
Mechanical Properties of LR Grade B Shipbuilding Steel Plates
1. Tensile Properties
| Property | Requirements |
|---|---|
| Yield Strength (ReH) | ≥ 235 MPa |
| Tensile Strength (Rm) | 400 – 520 MPa |
| Elongation | ≥ 22% |
2. Impact Toughness (0 ℃)
| Impact Energy | ≤ 50 mm | > 50 - 70 mm | > 70 - 150 mm |
|---|---|---|---|
| Longitudinal | ≥ 27 J | ≥ 34 J | ≥ 41 J |
| Transverse | ≥ 20 J | ≥ 24 J | ≥ 27 J |
3. Bending Properties
Conduct a 180° cold bending test (bending mandrel diameter d = 2a, where "a" is the plate thickness): No cracks or delamination shall appear on the load-bearing surface of the test specimen.
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