Hot Rolled Precision Alloy Seamless Steel Pipe Cold Drawn Schedule 40 Black

Product Specification

Precision Seamless Steel Pipe/Alloy Steel Pipe/ Cold Drawn /Hot Rolled Gr a Gr B Schedule 40 Black Seamless Steel Pipe

Product Superiority

Boiler & heat exchanger & condenser pipes is one of the our main products
With cold drawn or cold rolled process, high quality heat treatment process ,complete detection system.
Our products have earned high reputation domestic and overseas :

1) Pipe without defects on external surface
2)Products with good mechanical properties, Make sure Pipe bending without defects.
3)Can be customized prduce according to the drawings and requirements of client.

The difference between precision steel pipe and cold drawn pipe

1, cold drawing

Cold drawing, that is, in the case of metal pipe without heating with cold drawing machine drawing long, the advantage is not in high temperature, the disadvantage is larger residual stress, and can not be drawn too long cold drawing can improve toughness and tensile strength to get better mechanical properties. Cold drawing seamless steel tube process: round tube billet → heating → perforation → heading → annealing → pickling → multi-pass cold drawing → semi-finished pipe → heat treatment → straightening → water pressure test (flaw detection) → marking → storage.

Cold drawing and cold drawing difference: cold drawing and cold drawing are two different methods of cold working metal, they are not the same concept. Cold drawing refers to the method of applying tension at both ends of the metal material to make the material produce tensile deformation; Cold drawing refers to the method of applying a drawing force at one end of the material so that the material can be pulled out through a die hole. The hole of the die should be smaller than the diameter of the material. Cold drawing processing makes the material in addition to tensile deformation and extrusion deformation, cold drawing processing is generally carried out on a special cold drawing machine. Cold-drawn materials have better properties than cold-drawn materials. Main applications: automobile, motorcycle, refrigeration equipment, hydraulic parts, pneumatic cylinder, and other steel pipe precision, smoothness, cleanliness, mechanical properties of customers who have high requirements.

2, fine rolling fine rolling pipe is also called cold rolling precision steel pipe, is a seamless steel pipe production process.

The characteristics of the fine rolled pipe :(1) the tolerance size of the cold rolled precision steel pipe is high, the product precision is controlled in ±0.05mm, the inner and outer wall finish is good, and the surface has no oxide layer. (2) The comprehensive performance of cold rolled precision steel pipe is excellent, can withstand high pressure, cold bending, flaring, flattening, no cracking, no wrinkling, can do a variety of complex deformation and mechanical processing. (3) The promotion and application of precision seamless tube can save steel, improve processing efficiency, reduce processing procedures and equipment investment, can save costs and greatly save machining hours, improve production and material utilization rate, and help to improve product quality and reduce costs. Cold rolled precision steel tube is widely used in automobile, motorcycle, electric vehicle, pneumatic cylinder, petrochemical, electric power, shipbuilding, aerospace, bearing, pneumatic components, low pressure boiler and other fields.