1. Product Name: Square and rectangular tube 2. Size: 20x20mmâ??500x500mm, 20x30mmâ??400x600mm 3. Wall thickness: 1-17.75mm 4. Steel Grade: Q235B , Q345B, S235, S275, S355, STK490, STK400, C250, C350, Gr.B/C/D, etc 5. Standard 1) DIN EN 10210 (Europe) 2) DIN EN 10219 (Europe) 3) ASTM A500 GR A/B/C 4) GB/T 3094-2000 (China) 5) GB/T 6728-2002(China) 6) JISG 3466(Japan) 7) AS 1163(Australia) 6. Certificates API5L, API5CT, CE, CNAS, DNV, KR, ABS, ISO 9001:2008, ISO 14001 7. Surface Treatment Black, Painted, Oiled, Varnish coating, Galvanized, etc. 8. Marking Standard marking, or according to your request. 9. Pipe Length 6m, 12m, or as per customer's request 10. Technique: ERW Welded square and rectangular tube 11. Application Mechanical & manufacture, Steel structure,Ship building, Bridging, Automobile chassis 12). Main Market Middle East, Asia, Africa, and European country and America ,Canada, Australia, South America, etc 13). Advantages 1).Reasonable price with excellent quality 2).Rich supply and 23 year manufacturing experience, sincere service 3).Reliable forwarder, 4-hours away from loading port.