p265gh vs s355j2
Chemical Composition Comparison
| Element | P265GH (EN 10028-2) | S355J2 (EN 10025-2) | Key Differences |
|---|---|---|---|
| Carbon (C) | ≤ 0.20% | ≤ 0.22% | S355J2 allows slightly higher carbon for increased strength. |
| Manganese (Mn) | 0.80–1.40% | ≤ 1.60% | S355J2 may have higher Mn to enhance strength and hardenability. |
| Phosphorus (P) | ≤ 0.025% | ≤ 0.025% | Similar maximum limits for both. |
| Sulfur (S) | ≤ 0.015% (Grade B with controlled S) | ≤ 0.025% (standard grade) | P265GH has stricter sulfur control for pressure equipment. |
| Silicon (Si) | ≤ 0.40% | ≤ 0.55% | S355J2 allows slightly higher silicon. |
| Additional Alloys | May contain trace Ni, Cr, Mo, Nb, V, Ti | May contain trace Ni, Cr, Mo, Cu (for atmospheric corrosion resistance) | S355J2 may include copper for corrosion resistance; P265GH focuses on purity for pressure retention. |
Mechanical Properties Comparison
| Property | P265GH (EN 10028-2) | S355J2 (EN 10025-2) | Key Differences |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 265 MPa (for thickness ≤ 16 mm) | ≥ 355 MPa (for thickness ≤ 16 mm) | S355J2 is significantly stronger, designed for structural loads. |
| Tensile Strength (Rm) | 410–530 MPa | 470–630 MPa | S355J2 has a higher tensile strength range. |
| Elongation (A5) | ≥ 22% (for thickness ≤ 16 mm) | ≥ 22% (for thickness ≤ 16 mm in longitudinal direction) | Similar elongation, but S355J2 may have directional requirements. |
| Impact Toughness (KV) | ≥ 27 J at 0°C or 20°C (as specified) | ≥ 27 J at -20°C (J2 grade specifies low-temperature toughness) | S355J2 has superior low-temperature performance due to its J2 designation. |
Additional Performance & Application Comparison
| Aspect | P265GH | S355J2 | Key Differences |
|---|---|---|---|
| Heat Treatment | Typically supplied normalized (N) or normalized rolled. | Usually supplied in hot-rolled or normalized condition; may be quenched and tempered for higher strength. | S355J2 offers more flexibility in heat treatment for tailored properties. |
| Weldability | Good with proper procedures; low carbon equivalent (CEV). | Good, but may require preheating for thicker sections due to higher carbon. | Both are weldable, but S355J2's higher strength may necessitate more careful welding practices. |
| Typical Applications | Pressure vessels, boilers, heat exchangers, and piping systems. | Structural components, bridges, buildings, and machinery parts. | P265GH is for pressure retention; S355J2 is for load-bearing structures. |
| Temperature Resistance | Suitable for elevated temperatures (up to ~400°C in some cases). | Designed for ambient to moderately high temperatures; not for high-pressure thermal service. | P265GH excels in high-temperature pressure environments; S355J2 is optimized for structural integrity at lower temps. |
| Standards Focus | Pressure equipment safety (EN 10028-2). | Structural performance (EN 10025-2). | Different design philosophies: P265GH prioritizes leak-tightness and creep resistance; S355J2 focuses on strength and toughness. |
P265GH Superheater Tube factory
