Product Detail
Product Parameter
Structural Tube
Seamless steel pipes for the manufacture of pipes, vessels, equipment, fittings and steel structures.
Product description
● Standard
GB/T8162-2009 Main steel grades: 10, 20, 35, 45, Q345
● Uses
For general and mechanical structures
● Size deviation
Steel Tube Types | Tube size mm | Allowable deviation | ||
Common Grade | High Grade | |||
Hot rolled tube | Outer diameter D | All | ± 1% (minimum is ± 0.50mm) | — |
Wall thickness S | All | +15%-12.5% (minimum +0.45/ -0.40 mm) | — | |
Cold-drawn tube | Outer diameter D | 6 ~ 10 | ± 0.20 mm | ± 0.15 mm |
> 10 ~ 30 | ± 0.40 mm | ± 0.20 mm | ||
> 30 ~ 50 | ± 0.45 mm | ± 0.30 mm | ||
> 50 | ± 1% | ± 0.8% | ||
Wall thickness S | ≤ 1 | ± 0.15 mm | ± 0.12 mm | |
> 1 ~ 3 | +15%-10% | +12.5%-10% | ||
＞ 3 | +12.5%-10% | ± 10% | ||