Application Dynamics
1. The demand for construction machinery and hydraulic systems is steadily increasing
The application of 35CrMo precision cold-rolled seamless steel pipe in core components of construction machinery such as hydraulic cylinders, piston rods, and transmission shafts continues to expand due to its good hardenability, high strength, and toughness. With the recovery of domestic infrastructure projects and the growth of engineering machinery exports, the order volume of related pipes has remained stable and slightly increased since the second half of 2025.
2. Lightweight automotive components drive demand for high-precision pipes
In the manufacturing of automotive transmission shafts, half shaft sleeves and other components, 35CrMo cold-rolled precision pipes are gradually replacing some hot-rolled pipes due to their high dimensional accuracy and good surface quality. The demand for high-strength and tough pipes in the chassis and transmission system of new energy vehicles has also driven the expansion of the application of this material.
Market Trends
1. Acceleration of domestic substitution of high-end precision pipes
In the past, some high-precision 35CrMo cold-rolled pipes relied on imports. In recent years, leading domestic steel pipe enterprises have made breakthroughs in cold rolling processes, heat treatment control, and surface treatment technologies. Product size tolerances, surface roughness, and other indicators have approached or reached international levels, and the process of domestic substitution has significantly accelerated.
2. Active export market performance
Driven by overseas infrastructure and energy projects, the export volume of 35CrMo precision cold-rolled seamless steel pipes to Southeast Asia, the Middle East, South America and other regions has increased. Some companies have provided feedback that export orders have stricter requirements for material certification, third-party testing reports, and traceability.
Technological progress
1. Optimizing the cold rolling process to improve dimensional accuracy
Some domestic enterprises have improved the pass design of cold rolling rolls and optimized the distribution of rolling passes, controlling the outer diameter tolerance of 35CrMo precision pipes within ± 0.05mm and the wall thickness tolerance within ± 0.03mm, meeting the requirements of high-end hydraulic systems for fitting accuracy.
2. Refinement of heat treatment process
For the 35CrMo material, the quenching and tempering process parameters (quenching+high-temperature tempering) are further optimized to improve toughness, reduce deformation and cracking tendency while ensuring strength. Some enterprises have introduced controlled atmosphere heat treatment furnaces, which significantly reduce the depth of decarburization layer on the surface of pipes.
3. Enhancement of non-destructive testing capabilities
The application of ultrasonic testing and eddy current testing in the production of 35CrMo precision cold-rolled pipes has become more popular, and some enterprises have achieved fully automatic online testing, effectively improving product consistency and reliability.
Post time: Sep-03-2026