<br />Precision steel tubes is the high-precision steel material after treatment equal to or returned. Wall precision steel tube outer oxide layer, with high pressure without accuracy, and leakage high and finish high, and warp the cold, burning, flattening a bit without cracks, so it is mainly used for the production of pneumatic or hydraulic components such as cylinders or cylinder, which can be smooth, but also welded pipe after the cold treatment. Accuracy of chemical composition of steel is the main iron, C, Si, Mn, S, P, and chromium, and so on. Precision steel tubes appear in recent years, the strict requirement of endurance and roughness of the inner and outer wall. Features of cold drawn rolled precision steel pipes 1. Smaller diameter. 2. Small MOQ. 3. High accuracy, good surface quality. 4. The best performance.