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Key Characteristics of P295GH Steel2025-12-22
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Key Characteristics of P295GH Steel
1. Exceptional High-Temperature Performance
Design Temperature Adaptability: Operates stably in high-temperature environments below 350℃, maintaining a yield strength of ≥225 MPa at 350℃ (15% higher than P265GH), meeting requirements for medium-temperature pressure vessels.
Tensile Strength Range: With a thickness ≤100mm, tensile strength ranges from 460 to 580 MPa, ensuring structural integrity under high temperatures.
High-Temperature Stability: Exhibits slow performance degradation in environments below 500℃, suitable for equipment such as waste heat boiler drums and thermal power network steam headers.
2. Superior Low-Temperature Toughness
Impact Toughness: Achieves an impact energy of ≥27J at -20℃, ideal for low-temperature pressure vessels (e.g., liquefied gas storage tanks, air storage tanks) to prevent brittle fracture risks.
Brittle Fracture Resistance: Maintains good ductility in low-temperature environments, ensuring safety in cold regions or during sudden temperature drops.
3. Outstanding Weldability
Stable Weld Quality: Carbon equivalent (Ceq) ≤0.40%, reducing cold cracking tendency during welding and ensuring high compatibility between weld metal and base material.
Process Adaptability: Supports various welding methods, including manual arc welding, submerged arc welding, and gas metal arc welding, simplifying manufacturing processes.
Low Hot Cracking Risk: Sulfur (S) content ≤0.015% and phosphorus (P) content ≤0.025%, minimizing cracking tendencies in the heat-affected zone during welding.
4. Enhanced Corrosion Resistance
Media Adaptability: Resists corrosion from acidic and alkaline media, extending equipment service life and suitable for chemical containers (e.g., hydrogenation reactor shells, solvent regeneration towers).
Synergistic Alloying Effects: Total content of chromium (Cr), copper (Cu), molybdenum (Mo), and nickel (Ni) ≤0.7%, improving corrosion resistance through microalloying while controlling costs.