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Precision steel pipe

Precision steel tube is a high-precision steel tube material processed by cold drawing or hot rolling. Because the inner and outer walls of precision steel pipes have no oxide layer, high pressure without leakage, high precision, high smoothness, cold bending without deformation, flaring, flattening without cracks, etc., they are mainly used to produce pneumatic or hydraulic components, such as cylinders or The oil cylinder can be a seamless tube or a welded tube.

The precision steel pipe has high dimensional accuracy and high finish, the inner and outer surfaces of the pipe have no oxide film after heat treatment. The pipe is flared and flattened without cracks, cold-formed without deformation, and can withstand high pressure, and can be used for various complex deformations and deep mechanical processing.

chemical composition
The chemical composition of precision steel pipes includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr.

uses
Precision steel pipes are widely used in automobiles, motorcycles, electric vehicles, petrochemicals, electric power, ships, aerospace, bearings, pneumatic components, seamless steel pipes for medium and low pressure boilers, etc., and can also be applied to steel sleeves, bearings, hydraulics, machining, etc. field.



Production Process
The production process of precision steel pipes is the same as that of ordinary seamless pipes, with the addition of a final pickling and cold rolling process.
Precision steel pipe process
Tube billet-inspection-peeling-inspection-heating-piercing-pickling passivation-grinding-lubrication and air drying-cold rolling-degreasing-cutting-inspection-marking- -Product packaging

Hot rolled precision steel tube

Hot-rolled precision steel pipes use continuous casting round tube billet slabs or blooming slabs as raw materials, heated by a walking heating furnace, high-pressure water descaling, and then enter the rough rolling mill, and the rough rolling material enters the finishing mill after cutting the head, tail, and , Implementation of computer-controlled rolling, after the final rolling, it will undergo laminar cooling and coiling by a coiler to become a straight hair coil. The head and tail of straight hair curlers are often tongue-shaped and fish-tail-shaped, with poor thickness and width accuracy, and the edges often have defects such as wave shape, hemming, and tower shape. The coil weight is heavier, and the inner diameter of the steel coil is 760mm. After the straight hair coil is processed by a finishing line such as head-cutting, tail-cutting, trimming, and multi-pass straightening and leveling, then it is cut or re-coiled to become: hot-rolled steel plate, flattened hot-rolled steel coil, longitudinal Cut tape and other products. If the hot-rolled finished coil is pickled to remove the oxide scale and coated with oil, it will become a hot-rolled pickled coil.

 
Precision steel pipe specification table
10*2 38*4.5 60*7 108*4
14*2 38*5 60*8 108*4.5
14*3 38*6 63.5*3 108*5
18*3 40*2 63.5*3.5 108*6
19*2 40*3.5 63.5*4 108*7
19*2.75 42*3 63.5*4.5 108*8
19*3 42*3.5 63.5*5 108*9
20*2 42*4 63.5*6 108*10
22*2 42*4.5 63.5*9 108*12.5
22*2.5 42*5 63.5*10 114*4
22*3 45*2.5 68*4 114*4.5
22*3.5 45*3 68*6 114*5
22*4 45*3.5 70*3 114*6
25*2 45*4 70*3.5 114*9
25*2.5 45*4.5 70*4 133*4.5
25*3 45*5 70*4.5 133*5
25*3.5 45*6 70*5 133*6
25*4 48*3 70*6 133*6.5
25.4*4.5 48*3.5 70*8 133*7
27*2.5 48*4 70*9 133*8
28*2.5 48*4.5 70*10 133*9
28*3 51*3 73*3.5 133*10
28*3.5 51*3.2 73*4 133*12.5
28*4 51*3.5 73*4.5 140*6
28*4.5 51*4 73*5 140*8
30*3 51*4.5 73*5.5 140*10
32*2 51*5 73*7 159*4.5
32*2.5 51*6 76*3.5 159*5
32*3 54*3.5 76*4 159*5.5
32*3.5 54.5*3.5 76*4.5 159*6
32*4 54*5 76*5 159*7
32*4.5 57*3 76*6 159*8
32*5 57*3.5 76*7 159*10
34*3 57*4 89*4 159*12
34*3.5 57*5 89*4.5 168*5
34*4 57*6 89*5 168*6
34*4.5 57*10 89*6 168*7
34*5 57*12 89*7 168*8
34*8 60*3 89*8 168*9
36*4 60*3.5 89*10 168*10
38*2.5 60*4 102*4 194*6
38*3 60*4.5 102*4.5 194*7
38*3.5 60*5 102*5 194*9
38*4 60*6 102*6 194*10




 

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