Local producer
Standards: GB/T 8162, GB/T 8163
CN · SHS · Hollow sections
Square tubes
Cold-formed square structural tubes to GB/T 6728.
Tick sections to compare. Values in the units shown in each column header.
| Select to compare | Designation | dmm | bmm | tmm | Masskg/m | Amm² | Ix10⁶ mm⁴ | Zx10³ mm³ | Sx10³ mm³ | rxmm | Data |
|---|---|---|---|---|---|---|---|---|---|---|---|
| □300×300×12 | 300.0 | 300.0 | 12.0 | 104.63 | 13,328 | 180.515 | 1,203.4 | 1,420.2 | 116.4 | U | |
| □250×250×10 | 250.0 | 250.0 | 10.0 | 72.66 | 9,256 | 87.054 | 696.4 | 821.9 | 97.0 | U | |
| □200×200×8 | 200.0 | 200.0 | 8.0 | 46.50 | 5,924 | 35.657 | 356.6 | 420.8 | 77.6 | U | |
| □150×150×6 | 150.0 | 150.0 | 6.0 | 26.16 | 3,332 | 11.282 | 150.4 | 177.5 | 58.2 | U | |
| □120×120×5 | 120.0 | 120.0 | 5.0 | 17.38 | 2,214 | 4.776 | 79.6 | 94.1 | 46.4 | U | |
| □100×100×4 | 100.0 | 100.0 | 4.0 | 11.63 | 1,481 | 2.229 | 44.6 | 52.6 | 38.8 | U |
V Verified · C Calculated · U Unverified · D Deprecated – what this means
Where to buy
Producers of Hollow sections & pipes – local mills first. Buy direct from the mill for large tonnages, or through a steel distributor / stockist for small quantities and cut lengths.
International producer
Standards: JIS G 3444
International producer
Standards: EN 10210, EN 10219
International producer
Standards: JIS G 3444, JIS G 3466
International producer
Standards: ASTM A500, ASTM A1085
International producer
Standards: AS/NZS 1163
Buying checklist
- Specify the section designation, product standard and steel grade exactly (e.g. "□300×300×12 – GB/T 6728:2017").
- Ask for mill test certificates (EN 10204 type 3.1 or equivalent) traceable to the heat number.
- Sections from another standard system are not automatically equivalent – have the engineer approve any substitution.
- Check availability, minimum order quantity, stock lengths, lead time and delivery terms with the mill or distributor.
All producers of this product type →
Listing is informational only – not an endorsement, offer or confirmation of availability. Company details are marked UNVERIFIED until checked.