Q245R is a Chinese standard boiler and pressure vessel steel plate, commonly used in the manufacturing of boilers, pressure vessels, and other high-temperature and high-pressure equipment.

Q245R is a versatile, cost-effective material for boiler and pressure vessel construction, offering reliable performance under moderate pressure and temperature conditions. Its compliance with Chinese and international standards makes it a preferred choice in domestic and export markets.

Standard & Classification

Standard: GB 713-2014 (Chinese standard for boiler and pressure vessel plates)

Classification: Carbon-manganese steel, suitable for welded pressure vessels operating at room temperature and medium temperatures (up to ~400°C).

1. Boilers: Steam drums, furnace shells.

2. ressure Vessels: Storage tanks, reactors, heat exchangers.

3. Other: Petrochemical equipment, nuclear power auxiliary devices.

Heat Treatment

Typically supplied in hot-rolled (HR) or normalized (N) condition to ensure uniform microstructure and mechanical properties.

Comparison with Other Grades

Q245R vs. Q345R: Q345R has higher strength (345 MPa yield strength) due to added microalloying elements.

Q245R vs. SA516 Gr.60/70: Similar applications, but SA516 (ASTM standard) has stricter impact requirements.



Welding & Fabrication

1. Weldability: Good; preheating may be needed for thick plates.

2. Common Methods: SMAW, SAW, GTAW.

3. Post-Weld Heat Treatment (PWHT): Recommended for stress relief in thick sections.



Inspection & Certification

Mandatory non-destructive testing (UT, RT, MT/PT as per design requirements).

Certified to meet GB 713-2014 with mill test reports (MTRs).



Conclusion

Q245R is a reliable, cost-effective material for medium-pressure applications, offering good strength, weldability, and impact resistance. For higher pressures/temperatures, Q345R or alloy steels may be preferred.