Manufacturer for Hexagon Shape Sharp Corner Carbon & Alloy Seamless Steel Pipes & Tubes from China
Shape: The tubes shall be furnished in the following shapes, as specified by the purchaser: round, square, HEXAGON, rectangular and special sections.
Chemical Composition& Mechanical Properties(Type: Cold Drawn Seamless Mechanical/CDS)
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. |
CORNER/R-ANGLE 2degree/0.079″
CORNER/R-ANGLE 1degree/0.039′
NOTE THE RADIUS “R” CORNER.
