P355GH
1.0473Higher-strength pressure vessel steel — ReH >=355 MPa, guaranteed elevated-temperature properties. Between P265GH and 16Mo3 in the pressure vessel hierarchy. Used for boilers, steam drums, heat exchangers, and pressure piping operating to ~400°C. EN 10028-2, PED 2014/68/EU compliant. Good weldability.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | ASTM A516 Gr.70 (approximate) | — | REF |
| 🇪🇺 | EN | Europe | P355GH / 1.0473 | 1.0473 | 100% |
Sources: ASTM A516, EN 10028-2
Chemical composition comparison (wt%)
Side-by-side: P355GH (EN) (EN 10028-2) vs P355GH / 1.0473 (EN) (EN 10028-2)
| Element | P355GH (EN) | P355GH / 1.0473 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.22% | 0–0.22% | OK |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 0–1.6% | 0–1.6% | OK |
| P | 0–0.025% | 0–0.025% | OK |
| S | 0–0.015% | 0–0.015% | OK |
Mechanical properties
Normalized
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 490–630 | MPa |
| Yield Strength | ≥ 355 | MPa |
| Elongation | ≥ 20 | % |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
Compatibility verdict
P355GH and P355GH / 1.0473: 100% composition match
Close equivalents but NOT identical.
Related materials
S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
S690QL
1.8928High-strength quenched and tempered fine-grain structural steel with minimum yield strength of 690 MPa. Used for heavily loaded structures like mobile cranes, mining equipment, bridges, and pressure vessels.
S275JR
1.0044Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).
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