| Material | Standard | Outer Diameter (mm)Least * Most | Thickness (mm) |
| Cold-Rolled | SPCC-1B SPCC-CQ1 | 13.0*13.0 ~ 40.0~40.0 | 0.70~1.40 0.70~2.30 |
| Hot-Rolled | SPHC / SAE1008 | 18.0*18.0 ~ 40.0~40.0 | 1.50~3.20 |
| Square tubes | CR thickness | HR thickness |
| 12.7/12.7 | 0.7~1.4 | N/A |
| 16/16 | 0.7~1.8 | 1.5~1.8 |
| 18/18 | 0.7~1.8 | 1.5~1.8 |
| 19/19 | 0.8~2.0 | 1.5~2.0 |
| 20/20 | 0.8~2.0 | 1.5~2.0 |
| 21.3/21.3 | 0.8~2.0 | 1.5~2.0 |
| 21.4/21.4 | 0.8~2.0 | 1.5~2.0 |
| 22/22 | 0.8~2.0 | 1.5~2.0 |
| 25/25 | 0.8~2.0 | 1.5~2.0 |
| 25.4/25.4 | 0.8~2.0 | 1.5~2.0 |
| 30/30 | 0.8~1.8 | 1.5~1.8 |
| 33.4/33.4 | 0.8-3.0 | 1.5~3.2 |
| 38/38 | 0.8-3.0 | 1.5~3.2 |
| 50/50 | 1.2~3.0 | 1.5~3.2 |