12cr1mov Seamless Steel Pipe

12Cr1MoV seamless steel pipe is a chromium-molybdenum-vanadium pearlitic low-alloy heat-resistant seamless steel pipe. The boiler-specific grade is 12Cr1MoVG, and it mainly conforms to the GB/T 5310 standard, "Seamless Steel Tubes for High-Pressure Boilers." It is a core heat-resistant pipe material for high-pressure and ultra-high-pressure power plant thermal systems in China.

The material is based on low carbon, combined with 0.90%~1.20% chromium and 0.25%~0.35% molybdenum core alloys. 0.15%~0.30% vanadium is introduced to refine the grain and strengthen grain boundaries, and harmful impurities are strictly controlled. Its core performance advantages are significant: it maintains stable creep strength and oxidation resistance even under long-term service at 580℃; its high-temperature creep strength and fatigue life are superior to 15CrMo heat-resistant steel, with no significant risk of high-temperature aging; it is seamlessly integrally formed without weld seams or weak points, with uniform microstructure throughout, resulting in high pressure-bearing reliability; its hardening tendency is controllable, and stable welding can be achieved through standardized preheating and post-weld tempering heat treatment; the construction process is mature.

This type of pipe is widely used in main steam pipes, superheaters, and reheater tubes of power plant boilers. It is also suitable for petrochemical high-temperature hydrogenation units, high-pressure chemical media transportation, and nuclear power plant conventional island thermal pipelines. Its long-term service life can reach over 100,000 hours, making it a standard, economical heat-resistant pipe material for high-temperature and high-pressure conditions up to 580℃.

How to choose between 15CrMo, 20G, and 12Cr1MoVG boiler tubes?

The core principle is matching the design temperature: 20G is carbon boiler steel, suitable for low-pressure boilers up to 450℃, offering the best cost-effectiveness; 15CrMo is suitable for medium-temperature and medium-pressure boilers up to 550℃, with outstanding heat resistance and hydrogen resistance; 12Cr1MoVG is suitable for high-pressure power plant boilers up to 580℃, offering superior high-temperature endurance strength. Strictly follow the design parameters for selection.