0.15:1000, 0.4:1000, 0.5:1000 1:1000 or customized
Surface Roughness
Ra 0.02—0.4μm
Final supply conditions
Designation
Symbol
Description
Cold finished (hard)
BK
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
Cold finished (soft)
BKW
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).
Cold finished and stress-relieved
BKS
Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
Annealed
GBK
The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized
NBK
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.
Product Information
Company Information
FAQ
Q: Are you trading company or manufacturer ?
A: We are a professional seamless steel pipe manufacturer, has been involved in this industry for 10 years, with 260 experienced workers. Factory tours are very welcome.
Q: Are you trading company or manufacturer ?
Q: Are you trading company or manufacturer ?
