● Standard
GB/T8162-2009 Main steel grades: 10, 20, 35, 45, Q345
DIN 1629
ASTM A519
EN10210-1 (S235JRH、S275J2H、355J2H)
JIS G3445 (STKM), JIS G3441 (SCM)
● 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% | ||
