| Standard |
DIN |
| Place of Origin |
Shanghai China (Mainland) |
| Technique |
Cold Rolled |
Honed tubes Honed seamless tubes GradeST45.8, ST 52.3 BK+S Metric size O.D: 30 to 700mm, Max length 12m. Straightness: 0.5 -1.0/1000 Tolerance EXT: DIN 2391 Tolerance INT: ISO H8 Roughness(Ra): 0.2 to 0.4μ Typecold drawing, cold rolling, honed