small bore precision cold rolled carbon seamless steel pipe

Precision cold drawn steel tubes, also known as CDS tubes, are made from hot billets, processed by punching, rolling and elongation processes, and passed through a die on a mandrel plug to ultimately achieve the exact diameter and wall thickness designed. The Cold Drawn Seamless (CDS) manufacturing process can significantly increase the strength of seamless tubing, making it ideally suited for critical high safety and high performance applications. Zhonghe Steel brand cold drawn seamless tubes are made from high quality raw materials, using automated production lines and strict quality control. Our CDS tubes offer high dimensional tolerances, excellent cross-sectional characteristics, better surface finish and higher mechanical properties than corresponding grades of hot-worked seamless tubes. WAN Steel manufactures and wholesales many types of cold drawn seamless tubes for mechanical and hydraulic applications.

Outside Diameter 3mm-140mm 
Thickness 0.5-20mm
Material 10#, 20#, 35#, 45#, 16Mn, 30CrMo, 20Cr, 20CrMo,15CrMo, 35CrMo, 42CrMo4,  20Mn, ST35,ST37,E235, ASTM11A, ST35(E235),ST37 ,ST52(E355),ST45, E255, A106A.B, ST55, CK45, S45C, Q345B, E355, S355j2, 4130, 4140, 4340, SCM440, SCM415
Surface Black or bright
Standard GB/T8713, GB/T3639, GB/T8162, GB/T8163, ASTM-A519, EN10305-1, EN10305-4,  JIS-G3445, DIN2391, DIN2445,BS6323, GOST8734-75
Processing Cold rolled /cold drawn
Delivery Condition

(1) BK (+C): No heat treatment after last cold forming process; 

(2) BKW (+LC): After last heat treatment there is a light finishing pass (cold drawing);

(3) BKS (+SR): After the final cold forming process the tubes are stress relieve   annealed;

(4) GBK (+A): After the final cold forming process the tubes are annealed in a controlled atmosphere;

(5) NBK (+N): After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.

Packing Woven bag/ wooden or crate carton/ bundle packing/ plain end or vanished as per customer’s request.
Delivery time Normally 15-25 working days

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