P355GH (n° matière 1.0473)
EUApproximate matchCEN/EN · EN 10028-2
Family of fine-grain, killed carbon steel plates used to fabricate pressure vessels, boilers, separators and petrochemical equipment operating at moderate temperature (generally -30°C to roughly 400-500°C depending on grade). It's the most common plate family in industrial boilermaking, offering an excellent strength/weldability balance.
| Grade | Region | Standard | Re (MPa) | Rm (MPa) | Delta |
|---|---|---|---|---|---|
| P355GH (n° matière 1.0473) | EU | EN 10028-2 | 355 | 470–650 | reference |
| Neighboring grades — different strength | |||||
| P265GH (n° matière 1.0425) | EU | EN 10028-2 | 265 | 410–530 | -25% |
| SGV480 | JP | JIS G3118 | 265 | 480–610 | -25% |
| SGV480 | KR | KS D3540 | 265 | 480–590 | -25% |
| A516 Grade 70 | US | ASTM A516/A516M (ASME SA-516) | 260 | 485–620 | -27% |
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | Cu | Nb | V | Ti | N | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P355GH (n° matière 1.0473) | 0.1–0.22 | 1.1–1.7 | ≤0.6 | ≤0.025 | ≤0.015 | ≤0.3 | ≤0.3 | ≤0.08 | ≤0.3 | ≤0.02 | ≤0.02 | ≤0.03 | ≤0.012 | ≥0.02 |
| P265GH (n° matière 1.0425) | ≤0.2 | 0.8–1.4 | ≤0.4 | ≤0.025 | ≤0.015 | ≤0.3 | ≤0.3 | ≤0.08 | ≤0.3 | — | — | — | — | — |
| SGV480 | ≤0.27 | 0.85–1.2 | 0.15–0.3 | ≤0.035 | ≤0.035 | — | — | — | — | — | — | — | — | — |
| SGV480 | ≤0.27 | 0.85–1.2 | 0.15–0.4 | ≤0.03 | ≤0.03 | — | — | — | — | — | — | — | — | — |
| A516 Grade 70 | ≤0.28 | 0.85–1.2 | 0.15–0.4 | ≤0.035 | ≤0.035 | — | — | — | — | — | — | — | — | — |
Note: A European grade considered by most distributors to be the closest functional match to ASTM A516 Gr.70 (very comparable yield strength and tensile strength), although the composition ranges (notably Mn, Si) and test conditions differ. The Cr+Cu+Mo+Ni ≤ 0.70% limit is an additional constraint specific to the EN standard. The 355 MPa yield strength only applies to thicknesses ≤16 mm and decreases with thickness (down to 280 MPa beyond 100 mm).
Values compiled from public sources for guidance only — always verify against the official standard before use in design or fabrication.