Black Phosphated Hydraulic Steel Tubing EN10305-4 E235 Seamless Steel Tube

Black Phosphated Hydraulic Steel Tubing EN10305-4 E235 Seamless Steel Tube

Quick Detail:

• Size:OD4mm-60mm,TH0.5mm-7mm
• Standard:/EN10305-4 /DIN2391/C
• Material:ST35,ST37.4,ST37,ST45,ST52,ST52.4,E235,E255,E355,SAE1010,SAE1020.
• Delivery State:NBK_+ Black phosphated
• Raw material:Bao Steel,Huai Steel,XingCheng Steel with good quality.
• Length:5.8m,6m.
• Package:Bundles or wooden cases,with caps of ends.

Features:

• Surface Anti-rust:good property of antirust,both outside and internal tube surface flushing with anti-rust oil.
• Surface Color: Bright black color is homogeneously distributed on the tube surface.
• 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.
• Mechanical properties:better extending rate and strength property,after bending with no deformation,after flattening and flaring process with no crack.
• Raw material: Precision tubes are made from carbon steel from quality Bao Steel,XingCheng Steel,and HuaiSteel.

Description:

1.The steel grades of raw material used in our company are mainly ST35, ST37.4(10#), ST45 (20#), ST55 (35#), Ck45 (45#), ST52.4 (16Mn) etc. produced by Shanghai Baosteel Group.

2.Flattening test,Flaring test,tensile strength test,hydraulic pressure test are made for each batch of hydraulic tubing.

3.Internal surface:high cleaness and roughness.

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.