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1. Description: Seamless rectangular steel tubes, also known as rectangular hollow sections, are manufactured from hot rolled seamless steel pipes. Unlike welded sections, these are produced through hydraulic cold drawing, resulting in seamless tubes with tight size tolerances and perfect twist characteristics.
2. Commodity: S355J2H cold finished rectangular hollow section
| ASTM A519 | SAE1020, SAE1026, SAE1045, SAE1518, SAE1524, SAE1541, SAE4130, SAE4140, SAE4145, SAE4340, SAE8620 |
| DIN 2391-2 | ST35, ST45, ST52 |
| EN 10305-1 | E195, E235, E355, C35E, C45E, 25CrMo4, 34CrMo4, 42CrMo4 |
| EN 10305-4 | E215, E235, E355 |
| GB/T 3639 | 10#, 20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn |
| Side Dimensions | 80mm*60mm - 300mm*200mm |
| Wall Thickness (W.T) | 35mm max |
6. Manufacture method: Hydraulic cold drawn
| BKW (+LC) | BKS (+SR) | GBK (+A) | NBK (+N) |
|---|---|---|---|
| Cold drawn | Stress relieved | Annealed | Normalized |
8. End finish: Plain ends with square cuts, bevelled ends.
9. Standard export packing: In bundles tied with steel strips. Internal and external oil coating. External packing by PVC bags and knit bags.
10. Customized packing or marking: Available upon request.




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