P265GH vs P355GH
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
P265GH
Structural & HSLA Steel
P265GH is the EN 10028-2 workhorse pressure-vessel steel for European boiler and vessel fabrication — the normalized C-Mn grade that sits a step below P355GH in strength. Its GH suffix marks it as proven for high-temperature (elevated-temperature) service.
Standards: DIN 1.0425 (P265GH) · AISI A516 Gr.70 (near) · JIS SGV410 (near) · GB Q245R (near)
P355GH
Structural & HSLA Steel
P355GH is the EN 10028-2 carbon steel for pressure purposes at elevated temperature — the European counterpart of A516 Gr.70 for boilers and PED vessels. The GH suffix denotes guaranteed high-temperature proof strength.
Standards: DIN 1.0473 (P355GH) · AISI A516 Gr.70 (near) · JIS SGV480 (near) · GB Q345R (near)
Chemical composition compared (%)
| Element | P265GH | P355GH |
|---|---|---|
| C | ≤0.20 | 0.10–0.22 |
| Si | ≤0.40 | ≤0.60 |
| Mn | 0.80–1.40 | 1.10–1.70 |
| P | ≤0.025 | ≤0.025 |
| S | ≤0.010 | ≤0.015 |
| Cr | ≤0.30 | ≤0.30 |
| Cu | ≤0.30 | — |
| Mo | ≤0.08 | — |
| Ni | ≤0.30 | ≤0.30 |
Properties compared
| Property | P265GH | P355GH |
|---|---|---|
| Yield strength | ≥265 MPa | ≥355 MPa (≤16 mm) |
| Tensile strength | 410–530 MPa | 510–650 MPa |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
| Service | Elevated-temperature pressure equipment (EN 10028-2) | — |
| Impact | — | Tested at 20 °C per EN 10028-2 |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: P265GH · P355GH. Substitution decisions for certified parts stay with the design authority.