Hydraulic steel tube is a kind of cold-drawn precision seamless tube, the raw material through fine-drawing, oxidation-free bright heat treatment (NBK state), non-destructive testing, the inner hole of the steel tube after high-pressure rinsing, pickling, steel tube inside and outside the wall of the rust treatment with anti-rust oil, the two ends of the cap is used as a dust-proof treatment.
Hydraulic steel tube has excellent mechanical properties, so that it can be bent at any angle without deformation. Mainly used as hydraulic system oil circuit in the preparation of steel tubes, also called the hydraulic system in the hard piping, precision steel tubes for automobiles, specifications are generally for the outer diameter (D) Φ4mm-76mm, wall thickness (S) 0.5mm-6.0mm. length of 6 metres fixed (except custom-made), delivery status for the NBK (normalised), GBK (annealed), BKS (de-stressing annealed). The main materials used are ST35, ST37.4 (10#), ST45 (20#), ST55 (35#), ST52 (16Mn), etc. We can meet the requirements of high precision, high finish, high tensile strength, high mechanical properties of the steel tube customers.