Cold Drawn NBK Seamless Carbon Steel Tube For Nested Card Connector , Pipe Joints

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Cold Drawn NBK Seamless Carbon Steel Tube For Nested Card Connector , Pipe Joints




·Material: ST37.4,ST44.4,ST52.4,E235,E355.

·Delivery State:NBK+Black phosphate.


·Package:Bundles or wooden cases.

·Surface Anti-rust:Both outside and internal tube surface flushing with anti-rust oil.

·Surface quality:very smooth and bright without oxide scale,pock,strach,crack and other defects.

·Surface Cleaness:clean without iron scrap,dust,better for hydraulic system life.

·Properties:better extending rate and strength property,after bending with no deformation,after flattening and flaring process with no crack.

·Raw material:Bao Steel,Huai Steel,XingCheng Steel with good quality.


Synopsis of Process Routing: Cold drawn and bright NBK seamless steel tube is used as the tube to be phosphated. The phosphated is realized with the imported chemical fluid to form a black film. The antirust oil is absorbed by means of the micro pore on the film to prevent from the rust. The caps are covered at two ends of tube to prevent from the dust.

Main Features: color of steel tube: bright black. Color is homogeneously distributed on the tube surface. The tube has good property of antirust.

Main Application: used in hydraulic system, shippment industry,nested card connector (pipe joints) with matching.


Used in hydraulic system,nested card connector (pipe joints) with matching.



Mechanical properties at room temperature

Steel grade

Minimum values for the delivery conditiona,b

Steel name

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Zhangjiagang Sheng Ding Yuan Pipe-Making Co.,Ltd.
Building B,Gaoqiao Industries Park,Chengdong Road, Suzhou, Jiangsu, China (Mainland)
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