Seamless Carbon Steel Hydraulic Tubing For Excavator Hydraulic Oil
- 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
- 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
Chemical composition(cast analysis)a
% by mass
Mechanical properties at room temperature
Minimum values for the delivery conditiona,b
290 to 430
340 to 480
490 to 630
Used in hydraulic system,including automotive Hydraulic power
steering system, the clutch system, braking system, engine high
pressure oil pipe, excavator hydraulic oil pipe,nested card
connector (pipe joints) with matching,shippment industry.
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
Main Features: color of steel tube: bright black. Color is homogeneously
distributed on the tube surface. The tube has good property of
Packing and loading:
Laboratory Testing Equipment:
Tensile Strength Test,Water Pressure Test,Hardness Test,Chemical Compositon Test