Seamless Hydraulic Steel Tube and Tubing

Instruction

Applications:
for hydraulic and pneumatic power systems             
             
Size range:
O.D.:6-80mm     W.T.:0.5-12.5mm      L:  max12000mm                 

Seamless Tteel Tubing Manufacturing Process:
Steelmaking process:
The steelmaking process is at the discretion of the manufacturer
Steels are fully killed.
 
Tube manufacturing and delivery conditions:
The tubes are manufactured from hot finished seamless tubes by cold working.
Cold working is also applicable when actual production is needed.
Tubes are delivered in the delivery condition +N , means that after the final cold drawing operation, the tubes are normalized in a controlled atmosphere.

Tube appearance:
Both internal and external surface finish of the tubes smooth after cold forming as well as after Normalized Heat treatment,  Surface quality would be without ridges, dents or shallow grooves.The tube have smooth outer and inner surfaces with a roughness Ra≤ 4μm
A reduced roughness of Ra ≤2μm is workable for inner surface, the best ID roughness we could reach 0.4-0.8 μm only by cold drawing.

Steel Grade and Chemical Compositions: 

Test methods:
Tensile test
Flattening test
Drift expanding test
Dimensional inspection
Visual examination
Leak tightness test