Facing extreme pressure and complex loads, engineers require not only steel pipes but also absolute structural safety. Haihui Steel’s 35CrMo precision seamless tubes perfectly integrate material mechanical properties with a “5-micron” manufacturing precision.35CrMo (AISI 4130 / 34CrMo4) precision seamless steel pipe, renowned for its exceptional high strength, excellent toughness, and superior weldability, is widely used in petroleum machinery, high-end support structures, and power transmission systems.
Core advantages of the product
Excellent mechanical balance: 35CrMo has extremely high static strength and impact toughness, and remains robust even in low temperature environments of -20 ° C. It is the preferred choice for petroleum inspection, hydraulic supports, and high-pressure vessels.
50 micron tolerance control (± 0.05mm): With the precision rolling process, we control the tolerance within ± 0.05mm. This means that your components do not require extra polishing during assembly, achieving true ‘ready to use’.
NBK stabilization treatment: Each 35CrMo can be subjected to NBK (normalizing) protective atmosphere heat treatment as needed, ensuring uniform refinement of the structure, elimination of internal stress, and extremely low machining deformation rate.
100% inspection guarantee: Strictly implement ET (eddy current) and UT (ultrasonic) dual inspection to ensure that the pipe body has no pores or cracks, setting up the last line of defense for your engineering safety.
【 Main Applications 】
Oil and gas: drill pipe joints, geophysical instrument casings.
Heavy machinery: high-pressure oil system, transmission shaft sleeve, crane structural components.
New energy: Core bolt tube blank for wind power tower.
Post time: May-28-2026