Black Phosphated Seamless Hydraulic Line Steel Tubing ST37.4( E235 )

Black Phosphated Seamless Hydraulic Line Steel Tubing ST37.4( E235 )

Specifications:

Size:OD4mm-60mm,TH0.5mm-7mm

Standard:DIN2391/EN10305-4/DIN1630

Material: ST37,ST37.4,ST44.4,ST52,ST52.4

Delivery State:NBK+Black phosphate.

Quick Detail:

DIN2391(EN10305/4)seamless hydraulic line steel tubing ST37.4(E235) 

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

Surface clean,without oxidization.

Expanding,flaring,deformation with no crack.

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.

Internal Surface quality Control:We adopt automatic inner surface cleaning machine, rotating brush cleaning and high pressure oil flushing to clean the inner and outer surface.The new steel tube production craftsmanship can effectively remove all particulate attached to the inner and outer surface of tubes and thus achieving the utmost surface cleaness and polishness.

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

Applications:

This kind of hydrailic steel tubing produced by our company has excellent mechanical property and performance in process. The steel tube is able to withstand the high pressure, impact and particularly suitable for application of hydraulic machinery and automotive fabrication. The tube can be cold bent at any angle. No crack will occur after flaring and flattening for the industry, which the bending and forming is required in process.

Chemical Composition for Hydraulic Steel Tubing 

Mechancial properties for Hydraulic Steel Tubing