The manufacturing process begins with quenching treatment where tubes are heated to precise temperatures (860-870°C for 20MnTiB material) followed by rapid cooling through multi-stage water spraying systems. This initial phase transforms the internal structure to martensite, significantly enhancing strength and hardness. Subsequent high-temperature tempering using medium-frequency induction heating eliminates residual stresses from quenching while reducing brittleness, ultimately forming uniform tempered sorbite structure. The final precision finishing phase includes straightening, non-destructive testing, hardness verification, tensile testing, and ultrasonic inspection to ensure dimensional accuracy and performance compliance.

These Q&T condition steel pipes demonstrate exceptional mechanical properties with tensile strength ≥1050MPa, yield strength ≥930MPa, and room temperature impact energy ≥55J for 20MnTiB material grades. The enhanced mechanical characteristics provide reliable performance under heavy loading conditions while maintaining superior impact resistance. Excellent dimensional accuracy with roundness error ≤0.01mm and straightness within 0.1mm/m minimizes assembly stresses and ensures compatibility with precision component requirements.

The superior stability of Quenched and Tempered Steel Pipes results from eliminated internal stress concentrations, providing 2-3 times longer fatigue life compared to conventional steel tubes. The improved wear resistance and reduced surface roughness further minimize friction losses during operation, extending service life for sealing components and other matching parts.

These high-strength quenched tubes serve critical applications in mechanical manufacturing as automotive rear axle shafts, machine tool gears, and drive shafts. In engineering machinery, they perform reliably as hydraulic cylinder components for excavators and other high-pressure hydraulic applications. The energy and heavy industry sectors utilize these pressure-resistant tempered pipes for shale gas extraction manifolds, wind turbine towers, and with special materials, even nuclear power main pipelines requiring extreme corrosion resistance and collapse performance.

Technical Advantages:

  • Optimized strength-toughness balance through tempered sorbite structure 

  • Enhanced mechanical properties with tensile strength ≥1050MPa

  • Superior dimensional accuracy with minimal roundness and straightness errors

  • Extended fatigue life 2-3 times longer than conventional tubes

  • Excellent wear resistance with reduced surface roughness

  • Reliable performance in high-pressure and heavy-load conditions

Backed by Tanjan's 21 years of specialization in seamless steel tubes and 30 years of technical expertise in our R&D team, we provide customized Q&T solutions tailored to your specific application requirements. Our advanced manufacturing equipment and comprehensive testing capabilities ensure each Quenched and Tempered Steel Pipe meets exact specifications for materials, dimensions, surface finish, geometry, and mechanical properties, delivering reliable performance for your most demanding operational challenges.