Seamless Precision pipe is used for hydraulic cylinders, automobiles and other mechanical devices. Features: High-precision, high brightness, the inner and outer surface of the tube with high clean and no oxidation, and finally good mechanical properties of pipe, no leakage of high pressure, cold bending no crack flares flat deformation, to ensure that all services Efficient operation.
Standard: din2391 part 2, DIN en10305-1, din17175, etc .;
Material: calf nose, ST45, ST52.
Manufacturing methods: cold-rolled / cold-drawn
Delivery conditions: BK, BKS, Sr, GBK, NBK.
chemical composition
c-class maximum maximum
0.17 0.35 0.4 0.05 0.05 Nose
ST45 0.21 0.35 0.4 0.05
Zero point five
ST52 0.22 0.55 1.6 0.05
Zero point five
delivery conditions:
Cold working / hard (cold drawn) BK: No heat treatment during the last cold forming. Therefore, the pipe deformation capacity is very low.
Cold working / soft (light cold working) BKW: After the last heat treatment, there is a light finish pass (cold drawing) and appropriate follow-up treatment to cool the tube (such as bending and expanding) within a certain range.
Annealing GBK: Cold processing tube after final annealing in a controlled atmosphere or vacuum.
Normalizing NBK: Tube annealing on the transition point in a controlled atmosphere or vacuum.
