Precision Steel pipe is a kind of high precision steel pipe material after cold drawing or hot rolling treatment. As the precision steel pipe inside and outside the wall without oxidation layer, withstand high pressure leak-free, high-precision, high finish, cold bending deformation, expansion, flat-free cracks and so on a little, so mainly used to produce pneumatic or hydraulic components products, such as cylinder or oil cylinder, can be seamless pipe, there are welded tubes.
The chemical composition of precision steel pipe is carbon C, Si, MN mn, sulfur S, p, CR Cr.
The difference between precision steel pipe and seamless steel tube 1, seamless steel pipe is characterized by no welding seam, can withstand greater pressure. The product can be a very rough cast or cold dial.
2, precision steel pipe is a product in recent years, mainly inside the hole, the external wall size has strict tolerances and roughness.
Characteristics of cold drawn precision steel pipe 1. Smaller outside diameter. 2. High precision can be small batch production of 3. Cold drawn finished products with high precision and good surface quality. 4. The transverse area of steel pipe is more complicated.
5. Better steel pipe performance, more dense metal.
The difference of hot-rolled precision steel pipe Continuous casting round tube billet as raw material for hot-rolled precision steel pipe, after the step-type reheating furnace heating, high-pressure water descaling into the roughing mill, coarse rolling through the cutting head, tail, and then into the finishing mill, the implementation of computer-controlled rolling, after the end of rolling through laminar cooling and coiling machine coiling, become straight hair volume. The head and tail of straight hair are often tongue-like and fish-like, thickness, width accuracy is poor, the edge often exists wave shape, folding edge, tower shape and other defects. The volume weight is heavier and the diameter of the steel coil is 760mm. will be straight hair through the cutting head, cutting tail, impressing and multi-channel straightening, leveling and other finishing line treatment, and then cut plate or heavy volume, that becomes: hot-rolled steel plate, flat hot rolled coil, slitting belt and other products. If the hot rolled finishing coil is removed by pickling and the oxidized skin is oiled, the hot rolled pickling plate rolls.