Characteristics of 12Cr1MoVG Thick to Medium Seamless Tubes

Characteristics of 12Cr1MoVG Thick to Medium Seamless Tubes
1. Excellent High-Temperature Resistance
High-Temperature Strength: The 12Cr1MoVG seamless tube maintains high endurance strength and creep resistance at 580°C, with endurance strength 1.4 times that of 2.25Cr-1Mo steel, making it suitable for long-term high-temperature operation.
Oxidation Resistance: A dense oxide film forms on the surface in high-temperature oxidizing environments, effectively slowing corrosion rates. At 580°C, the annual corrosion rate is only 0.042–0.050 mm/year, and at 600°C, it is 0.129–0.220 mm/year, outperforming ordinary carbon steel in corrosion resistance.
2. Superior Mechanical Properties
High Strength and Toughness: With a tensile strength of 470–640 MPa, yield strength ≥255 MPa, longitudinal elongation after fracture ≥21%, transverse elongation ≥19%, longitudinal impact energy ≥40 J, and transverse impact energy ≥27 J, it combines strength and ductility.
Fatigue Resistance: The material exhibits a long fatigue life under alternating stress, making it suitable for vibrating or frequently started/stopped applications.
3. Reliable Corrosion Resistance
Environmental Corrosion Resistance: Through alloy design (containing Cr, Mo, V, etc.), it performs exceptionally well in corrosive media containing sulfur, chlorine, or other aggressive substances, making it ideal for harsh environments like petrochemical and marine engineering.
Hydrogen Corrosion Resistance: In high-temperature, high-pressure hydrogen environments, the material demonstrates high stability and is resistant to hydrogen embrittlement or hydrogen-induced cracking.
4. Advanced Manufacturing Processes
Hot Rolling Process: Utilizes steps such as round tube billet heating, piercing, three-roll skew rolling or continuous rolling, sizing, and cooling. This method offers high production efficiency and lower costs, suitable for mass production.
Cold Drawing Process: Achieves higher dimensional accuracy and surface quality through annealing, pickling, multi-pass cold drawing, and heat treatment, making it ideal for precision applications.