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PRODUCT DESCRIPTION
Alloy seamless pipes are made of 20CrMnTi high-quality alloy structural steel. The seamless pipe body is formed by hot rolling or cold drawing process. It has high strength, high toughness and excellent hardenability. The chromium-manganese-titanium alloy composition gives the material good wear resistance and fatigue resistance. After heat treatment, the surface hardness can reach above HRC60, while maintaining the toughness of the core, which is suitable for heavy load and high speed conditions. The inner wall of the pipe is smooth and seamless, can withstand working pressure above 60MPa, and has a temperature range of -40℃ to 450℃. It has excellent matching precision machining performance and is widely used in the manufacture of key components such as heavy machinery transmission shafts, gearbox support pipes, hydraulic system high-pressure pipelines, and automobile gearbox mandrels, engineering machinery slewing bearings, etc. It also plays an important role in oil drilling tools, mining machinery connecting rods and aerospace precision hydraulic systems.
20CrMnTi seamless carbon steel pipe is designed based on the characteristics of carburizing steel. With its low carbon core (carbon content 0.17%-0.24%) and chromium-manganese-titanium alloy, it forms a gradient performance structure after carburizing and quenching. The surface hardened layer reaches HRC60 or above for wear and corrosion resistance, and the core maintains ≥600MPa tensile strength and ≥40J (-40℃) low-temperature impact toughness. As a medium-to-high hardenability material, the seamless pipe can achieve full-section hardening within a wall thickness range of 30mm. Combined with the precise dimensional control of hot rolling/cold drawing process (tolerance ±0.3mm), it is particularly suitable for manufacturing dynamic pressure-bearing systems that withstand alternating stress and impact loads: the planetary gear shaft of the automobile gearbox runs continuously at a speed of 8000rpm, the hydraulic oil pipe of the slewing bearing of engineering machinery withstands 60MPa pulsating pressure, and the stabilizer pipe body of the oil drilling tool resists underground composite vibration wear. Its excellent cold-bending formability (bending radius ≤ 2D) and controllable welding crack rate (weld strength retention rate > 90% after preheating to 200°C) make it an ideal material for heavy-duty truck drive shafts, aviation hydraulic actuators and wind turbine pitch bearing sleeves, achieving a fatigue life cycle of more than 20,000 hours under extreme working conditions.
CHEMICAL COMPOSITION
Zhongjing Steel Group (Guangdong) Co.,Ltd. specializes in the production of cold-rolled/hot-rolled coils, carbon steel pipes, bars, and PPGI materials. It is a modern enterprise integrating carbon steel production, processing, and trade. It is a Chinese iron and steel enterprise group.
