p265gh vs 16mo3
Chemical Composition Comparison
| Element | P265GH (EN 10028-2) | 16Mo3 (EN 10028-2) | Key Differences |
|---|---|---|---|
| Carbon (C) | ≤ 0.20% | 0.12–0.20% | 16Mo3 has a narrower and slightly higher carbon range to enhance high-temperature strength. |
| Silicon (Si) | ≤ 0.40% | ≤ 0.35% | P265GH allows slightly more silicon; 16Mo3 keeps it lower to reduce oxidation at high temperatures. |
| Manganese (Mn) | 0.80–1.40% | 0.40–0.90% | P265GH has higher manganese for general strength; 16Mo3 uses less Mn to prioritize creep resistance. |
| Phosphorus (P) | ≤ 0.025% | ≤ 0.025% | Both have strict phosphorus limits for toughness. |
| Sulfur (S) | ≤ 0.015% | ≤ 0.010% | 16Mo3 has stricter sulfur control for improved high-temperature cleanliness and resistance. |
| Molybdenum (Mo) | Not intentionally added | 0.25–0.35% | 16Mo3 contains molybdenum to enhance creep strength and oxidation resistance at elevated temperatures. |
| Other Elements | May contain trace Nb, V, Ti | Usually plain with Mo as the primary alloy | 16Mo3 relies on Mo for high-temperature performance; P265GH is carbon-manganese based. |
Mechanical Properties Comparison
| Property | P265GH (EN 10028-2) | 16Mo3 (EN 10028-2) | Key Differences |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 265 MPa (for thickness ≤ 16mm) | ≥ 270 MPa (for thickness ≤ 16mm) | Similar yield strength, but 16Mo3 may have a slight edge in thinner sections. |
| Tensile Strength (Rm) | 410–530 MPa | 440–590 MPa | 16Mo3 has a higher tensile strength range, especially at elevated temperatures. |
| Elongation (A5) | ≥ 22% (for thickness ≤ 16mm) | ≥ 22% (for thickness ≤ 16mm) | Similar elongation requirements, ensuring adequate ductility. |
| Impact Toughness | ≥ 27 J at 0°C or 20°C (as specified) | ≥ 27 J at 0°C (common requirement) | Both require good toughness, but 16Mo3 is tested for high-temperature service stability. |
Physical (Mechanical-Related) Properties & Application Comparison
| Property/Application | P265GH | 16Mo3 | Key Differences |
|---|---|---|---|
| Heat Treatment | Usually supplied normalized (N) or normalized rolled | Usually supplied normalized (N) or normalized and tempered | Both can be normalized, but 16Mo3 may undergo tempering for enhanced high-temperature properties. |
| Intended Use | Pressure vessels, boilers, and piping at moderate temperatures (up to ~400°C) | High-temperature pressure vessels, boilers, and heat exchangers (up to 500–550°C) | 16Mo3 is specifically designed for higher-temperature service with molybdenum alloying. |
| Weldability | Good, but requires careful procedures for pressure integrity | Good, but may need preheating/post-weld heat treatment for thick sections | Both are weldable, but 16Mo3 demands more attention to avoid high-temperature cracking. |
| High-Temperature Performance | Suitable for temperatures up to ~400°C | Superior at elevated temperatures (up to 500–550°C) due to molybdenum | 16Mo3 retains strength and oxidation resistance much better at higher temperatures. |
| Creep Resistance | Limited | Enhanced creep resistance due to molybdenum content | 16Mo3 is preferred for long-term high-temperature applications. |
| Standard Reference | EN 10028-2 (pressure vessel steel) | EN 10028-2 (pressure vessel steel, but with Mo alloying) | Both under the same standard series, but 16Mo3 is a specialized grade for high-temperature service. |
P265GH 16Mo3 Steel Pipe for heat-resistant pressure vessels factory
