ENEnglish
VITiếng Việt
KO한국어
FRFrançais
ITItaliano
PTPortuguês
ESEspañol
HEעברית
ARالعربية
Structural steel · Hollow sections
Structural hollow sections – SHS, RHS and CHS for columns, trusses and bracing
Hollow sections are strong in compression and torsion, clean to look at and easy to protect – the natural choice for columns, trusses, space frames, canopies and bracing. World Steel sources square, rectangular and circular hollow sections to American, Australian, European, Japanese and Chinese standards.
- SHS · RHS · CHS
- Section shapes square, rectangular, circular
- ≈ 350 MPa
- Most-used strength S355J2H · C350L0 · A500 Gr C
- Cold-formed / hot-finished
- Two production routes EN 10219 / EN 10210
- Less paint
- Smaller surface area than open sections
Cold-formed or hot-finished?
Cold-formed hollow sections are roll-formed from strip and welded – the most common and economical type (EN 10219, ASTM A500, AS/NZS 1163, JIS G3466, GB/T 6728). Their corners are work-hardened, with tighter corner radii rules for welding. Hot-finished sections (EN 10210) are formed or normalised hot, with uniform properties and smaller corner radii – preferred for heavily loaded or fatigue-sensitive members.
Hollow sections carry axial load equally about both axes, resist torsion and lateral buckling, and need less paint and fire protection per metre than open sections of the same capacity.
Aplicações
Where hollow sections work best
Columns
Equal strength in both directions – multi-storey and portal columns, often concrete-filled.
Trusses & space frames
Light, stiff chords and diagonals with direct welded joints.
Bracing & struts
High buckling resistance for their weight.
Canopies & architecture
Clean lines for exposed steel, façades and walkways.
Handrails & access
Stairs, platforms and guard rails.
Light frames
Mezzanines, equipment frames and modular buildings.
Normas e conformidade
Hollow section standards
Product standards in our export markets.
United States
- ASTM A500 · A1085 · A53Cold-formed structural tubing; HSS with tighter tolerances; pipe
Australia & New Zealand
- AS/NZS 1163Cold-formed structural steel hollow sections
Europe
- EN 10219-1/-2 · EN 10210-1/-2Cold-formed and hot-finished structural hollow sections
Japan
- JIS G3466 · G3444Square / rectangular and round carbon steel tubes for structures
China
- GB/T 6728 · GB/T 8162 · JG/T 178Cold-formed hollow sections; seamless structural tubes; building square tubes
Resumo apenas para orientação – prevalecem a especificação do projeto, a edição da norma adotada e a autoridade competente.
By standard
Hollow section grades
Minimum yield strength; check the full standard and impact sub-grade.
| Standard | Common grades | Min. yield | Note |
|---|---|---|---|
| USA – ASTM A500 | Gr B · Gr C | 315 / 345 MPa (rect.); 290 / 315 MPa (round) | Most used in the US |
| USA – ASTM A1085 | Gr A | 345 MPa | Tighter tolerances, Charpy tested |
| Australia – AS/NZS 1163 | C250L0 · C350L0 · C450L0 | 250 / 350 / 450 MPa | L0 = impact tested at 0 °C |
| Europe – EN 10219 (cold-formed) | S235JRH · S275J0H · S355J2H · S420MH · S460MH | 235 – 460 MPa | Most common in Europe |
| Europe – EN 10210 (hot-finished) | S355J2H · S355NH · S460NH | 355 – 460 MPa | Uniform properties |
| Japan – JIS G3466 / G3444 | STKR400 · STKR490 / STK400 · STK490 | 245 / 325 MPa; 235 / 315 MPa | Square-rectangular / round tubes |
| Japan – column tubes | BCR295 · BCP235 / BCP325 | 295 / 235 / 325 MPa | Cold-formed building columns |
| China – GB/T 6728 · GB/T 8162 | Q235 · Q355 / 20# · Q355 | 235 / 355 MPa | Cold-formed / seamless structural tubes |
FAQ
Perguntas frequentes
What is the difference between SHS, RHS and CHS?
Square hollow section, rectangular hollow section and circular hollow section – the shape of the tube.
Is structural tube the same as pipe?
No. Structural hollow sections are specified by outside dimensions, wall thickness and yield strength; pipe is specified for conveying fluids by nominal size, schedule and pressure rating. Some pipe grades are also used structurally.
Which grade is equivalent to S355J2H?
Nearest grades are ASTM A500 Gr C or A1085, AS/NZS 1163 C350L0, JIS STKR490 and GB Q355 – with differences in toughness and tolerances to check.
Hollow sections for your structure
Send the section list or drawings – we source and fabricate to the standard you need.