p265gh vs s275jr
Chemical Composition Comparison
| Element | P265GH (EN 10028-2) | S275JR (EN 10025-2) | Key Differences |
|---|---|---|---|
| Carbon (C) | ≤ 0.20% | ≤ 0.21% (for thickness ≤ 40mm) | Similar carbon content, but S275JR allows slightly higher carbon in thicker sections. |
| Silicon (Si) | ≤ 0.40% | Usually ≤ 0.50% (not always specified) | P265GH has stricter silicon control; S275JR may have higher silicon for deoxidation. |
| Manganese (Mn) | 0.80–1.40% | 1.00–1.50% (for thickness ≤ 40mm) | S275JR typically has higher manganese for enhanced strength and hardenability. |
| Phosphorus (P) | ≤ 0.025% | ≤ 0.035% | P265GH has stricter phosphorus limits for better toughness in pressure applications. |
| Sulfur (S) | ≤ 0.015% | ≤ 0.045% (common grade) | P265GH has much lower sulfur for improved cleanliness and pressure resistance; S275JR allows higher sulfur for general structural use. |
| Other Elements | May contain trace Nb, V, Ti for strengthening | Usually plain carbon-manganese steel; may have residual elements | P265GH is optimized for pressure retention; S275JR is general-purpose structural steel. |
Mechanical Properties Comparison
| Property | P265GH (EN 10028-2) | S275JR (EN 10025-2) | Key Differences |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 265 MPa (for thickness ≤ 16mm) | ≥ 275 MPa (for thickness ≤ 16mm) | Similar yield strength, but S275JR may have slightly higher values in some thicknesses. |
| Tensile Strength (Rm) | 410–530 MPa | 370–530 MPa | P265GH has a higher minimum tensile strength; S275JR has a wider but lower range. |
| Elongation (A5) | ≥ 22% (for thickness ≤ 16mm) | ≥ 23% (for thickness ≤ 16mm; longitudinal) | S275JR requires slightly higher elongation for ductility in structural applications. |
| Impact Toughness | ≥ 27 J at 0°C or 20°C (as specified) | Not typically required (unless specified as S275J0/J2/K2) | P265GH has mandatory impact toughness for pressure vessels; S275JR only requires it for specific sub-grades. |
Physical (Mechanical-Related) Properties & Application Comparison
| Property/Application | P265GH | S275JR | Key Differences |
|---|---|---|---|
| Heat Treatment | Usually supplied normalized (N) or normalized rolled | Usually supplied in hot-rolled or normalized condition | Both can be normalized, but P265GH often requires tighter control for pressure retention. |
| Intended Use | Pressure vessels, boilers, heat exchangers, piping systems | General structural applications (buildings, bridges, machinery) | P265GH is for pressure-containing equipment; S275JR is for load-bearing structures. |
| Weldability | Good, but requires careful procedures for pressure integrity | Excellent, with simple welding techniques | S275JR is easier to weld due to lower carbon equivalent and fewer restrictions. |
| High-Temperature Performance | Suitable for elevated temperatures (up to ~400°C) | Not designed for high-temperature service | P265GH retains strength at higher temperatures; S275JR may lose strength rapidly above 300°C. |
| Standard Reference | EN 10028-2 (pressure vessel steel) | EN 10025-2 (structural steel) | Different standards with distinct requirements based on application. |
P265GH Steel Pipe for heat-resistant pressure vessels Factory
