1. Standard: ASTM A36, A500, EN10025, EN10255
2. Materials: ASTM A36, A500, GR.B, S195T, SS400, ST37, ST52.3 etc.
3. Specification: 15*15mm-800*800mm.
4. Shape: square, rectangle.
5. The surface treatment: hot galvanized, coated with oil, pickling.
6. Application: Widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural greenhouses, automotive, railway, highway guardrail, container framework, furniture, decoration as well as steel and other fields
| GB/T 13793 | Longitudinal electric resistance welded steel tubes |
| GB/T 6728 | Cold formed steel hollow sections for general structureDimensions, shapes, weight and permissble deviations |
| ASTM A500 | Cold Formed Welded and Seamless Carbon Steel Steel Structural Tubing in Round and Shapes |
| ASTM A53 | Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless |
| EN 10210 | Hot finished structural hollow sections of non-alloy and fine grain structural steels |
| EN 10219 | Cold formed welded structural hollow sections of non-alloy and fine grain steels |
| JIS G 3466 | Carbon steel Square for general structural purposes |
| BS 1387 | Steel Tubes for use for Water, Gas, Air and Steam |
| BS 6323 | PART5 SEAMLESS AND WELDED STEEL TUBES FOR AUTOMOBILE MECHANICAL AND GENERAL ENGINEER PURPOSE |
| IS : 1161 | Steel Tubes For Structural purpose and Electric poles. |
| IS : 3601 | Steel tubes for mechanical & general engineering purposes. |
| IS : 3074 | Steel tubes for Automobile purpose. |
| IS : 4923 | Steel tubes for Hollow sections used in structures |
| DIN 1626 | WELDED CIRCULAR TUBES OF NON ALLOY STEELS WITH SPECIAL QUALITY EQUIREMENTS |
| DIN 2394 | WELDED AND SIZED PRECISION STEEL TUBES |
