Equivalent materials to S355J2WP
- Sep 09, 2026
Knowledge
Chemical Composition of S355J2WP Weathering Steel Plate
| Element | Content | Description |
|---|---|---|
| Carbon (C) | ≤ 0.12 % | Ensures good weldability. |
| Silicon (Si) | ≤ 0.75 % | Deoxidizer in the steelmaking process. |
| Manganese (Mn) | ≤ 1.00 % | Improves strength and toughness. |
| Phosphorus (P) | 0.06 - 0.15 % | A key weathering element; its content is higher than in ordinary steel and is essential for forming a protective rust layer. |
| Sulfur (S) | ≤ 0.030 % | An impurity element; controlling its content ensures steel quality. |
| Chromium (Cr) | 0.30 - 1.25 % | A key weathering element that significantly enhances resistance to atmospheric corrosion. |
| Copper (Cu) | 0.25 - 0.55 % | A key weathering element that works synergistically with phosphorus and chromium to enhance corrosion resistance. |
| Nickel (Ni) | ≤ 0.65 % | Improves toughness and helps enhance corrosion resistance. |
| Aluminum (Al) | ≥ 0.020 % | Used to refine the grain structure. |
Note: The data above are typical reference values. The determination of whether a specific material’s chemical composition meets specifications should be based on the corresponding product certificate of conformity.
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