Cold Drawn Seamless Steel Pipe
Cold Drawn Seamless Steel Pipe
Cold Drawn Seamless Steel Pipe Supplier in China
Cold drawn seamless tubes are steel tubes produced by a cold drawing process. In this process, a hot-rolled seamless tube blank is used as the raw material and is drawn through a die at room temperature to reduce its diameter and wall thickness, and improve its dimensional accuracy and surface finish.
Cold drawn seamless tubes have high dimensional accuracy. The deviation of their outer diameter and wall thickness is very small, which can meet the strict requirements of various precision equipment and components.
The surface of cold drawn seamless tubes is smooth and free from defects such as pits and cracks, which is beneficial to improve the corrosion resistance and wear resistance of the tubes.
Cold Drawn Seamless Steel Pipe Specification
| Product Name | Seamless Steel Pipe/Tube |
|---|---|
| Manufacturing Standard | ASTM A106, ASTM A53, ASTM A179, DIN2391, EN10216, JISG3454, JISG3441 etc. |
| Steel Grade | GR.A, GR.B, GR. C, 10#, 20#, 35#, 45#, STK 500/540, SPTG370, STPG410, STS370/410/480, 1008, 1020, 1013, 4140, 5130 etc. |
| Product Types | Engineering Pipe, Tubing and Casing, Roller Pipe, Construction Pipe, Automobile pipe, etc. |
| Outer Diameter | 10 - 120mm |
| Wall Thickness | 0.5mm ~ 20mm |
| Length Range | 0.5 - 12M |
| Surface Coating | Oiling, Lacquering, Hot-Dip Galvanizing, Powder Painted, Electro-Galvanized |
| Pipe End Type | Square End, Bevelled End, Threaded End, Grooved End, Shouldered End |
Supply Condition
| Cold drawn / hard (+C) | No heat treatment after last cold forming process. |
|---|---|
| Cold drawn / soft | After last heat treatment there is a light finishing pass (cold drawing). |
| Cold drawn (+SR) | After the final cold forming process the tubes are stress relieve annealed. |
| GBK (+A) | After the final cold forming process the tubes are annealed in a controlled atmosphere. |
| NBK (+N) | After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere. |
Seamless Steel Pipe Manufacturing Process
The round steel bar is used to produce seamless pipe. After heating the bar to a high temperature, a probe is put into the bar to produce a hole. The cylinder is then moved to rollers that shape it to the required diameter and wall thickness.
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