Products / Square pipe
Square pipe
Square hollow section. Weights use nominal calculation radii from EN 10219-2 at 7.85 g/cm³. Manufactured corners and delivered mass are subject to tolerances; confirm the required section and grade.
- Size range
- 20×20 to 400×400 mm
- Wall range
- 1.5 to 12.5 mm
- Published
- EN 10219-2 (calculated)
- In verification
- GOST 8639 · ASTM · rectangular
Same outside size. Different wall.
Wall thickness changes both weight and the internal opening. Include it alongside the outside dimensions when requesting square hollow sections.
Send the complete designation from your drawing with your quote request.
Mass calculated using EN 10219-2 nominal corner radii at 7.85 g/cm³. Corners are simplified in the drawings.
Sizes and weights by standard
Weights are theoretical, from nominal dimensions at 7.85 g/cm³: Actual delivered mass and billing basis must be confirmed with the quotation. Verified tables have been checked against the stated standard or catalogue source; Calculated values are nominal estimates, subject to the stated assumptions.
EN 10219-2Cold-formed square hollow section
Calculated
Each cell is kg per metre for that outside size (rows) and wall thickness (columns). Corner radii per EN 10219-2: outer 2t up to 6 mm wall, 2.5t up to 10 mm, 3t above.
| Sizemm | 1.5wall, mm | 2wall, mm | 2.5wall, mm | 3wall, mm | 4wall, mm | 5wall, mm | 6wall, mm | 8wall, mm | 10wall, mm | 12.5wall, mm |
|---|---|---|---|---|---|---|---|---|---|---|
| 20×20 | 0.826 | 1.05 | 1.25 | – | – | – | – | – | – | – |
| 25×25 | 1.06 | 1.36 | 1.64 | 1.89 | – | – | – | – | – | – |
| 30×30 | 1.30 | 1.68 | 2.03 | 2.36 | – | – | – | – | – | – |
| 40×40 | 1.77 | 2.31 | 2.82 | 3.30 | 4.20 | 4.99 | – | – | – | – |
| 50×50 | 2.24 | 2.93 | 3.60 | 4.25 | 5.45 | 6.56 | 7.56 | – | – | – |
| 60×60 | 2.71 | 3.56 | 4.39 | 5.19 | 6.71 | 8.13 | 9.45 | – | – | – |
| 70×70 | 3.18 | 4.19 | 5.17 | 6.13 | 7.97 | 9.70 | 11.3 | 13.8 | – | – |
| 80×80 | 3.65 | 4.82 | 5.96 | 7.07 | 9.22 | 11.3 | 13.2 | 16.4 | 19.3 | – |
| 100×100 | – | 6.07 | 7.53 | 8.96 | 11.7 | 14.4 | 17.0 | 21.4 | 25.6 | 29.1 |
| 120×120 | – | 7.33 | 9.10 | 10.8 | 14.2 | 17.5 | 20.7 | 26.4 | 31.8 | 36.9 |
| 140×140 | – | – | 10.7 | 12.7 | 16.8 | 20.7 | 24.5 | 31.4 | 38.1 | 44.8 |
| 150×150 | – | – | 11.5 | 13.7 | 18.0 | 22.3 | 26.4 | 33.9 | 41.3 | 48.7 |
| 160×160 | – | – | – | 14.6 | 19.3 | 23.8 | 28.3 | 36.5 | 44.4 | 52.6 |
| 180×180 | – | – | – | 16.5 | 21.8 | 27.0 | 32.1 | 41.5 | 50.7 | 60.5 |
| 200×200 | – | – | – | – | 24.3 | 30.1 | 35.8 | 46.5 | 57.0 | 68.3 |
| 250×250 | – | – | – | – | – | 38.0 | 45.2 | 59.1 | 72.7 | 88.0 |
| 300×300 | – | – | – | – | – | 45.8 | 54.7 | 71.6 | 88.4 | 108 |
| 400×400 | – | – | – | – | – | – | – | 96.7 | 120 | 147 |
GOST 8639 · GOST 8645CIS square and rectangular tube
In verification
CIS tube uses different corner radii, so weights differ slightly from the EN figures.
We do not publish a figure we have not checked. Need this now? We source it per order: request a quote with the designation from your drawing.
EN 10219-2Rectangular hollow section
In verification
Rectangular sizes, e.g. 60×40, 80×40, 100×50.
We do not publish a figure we have not checked. Need this now? We source it per order: request a quote with the designation from your drawing.
ASTM A500American square HSS
In verification
Square and rectangular structural tubing, grades B and C.
We do not publish a figure we have not checked. Need this now? We source it per order: request a quote with the designation from your drawing.
GB/T 6728Chinese hollow section
In verification
Cold-formed square and rectangular tube, Q235B and Q355B.
We do not publish a figure we have not checked. Need this now? We source it per order: request a quote with the designation from your drawing.
Grades across standards
Close in strength, not identical in chemistry or impact testing. Confirm the exact sub-grade per project.
| Role | GOST | EN | ASTM | GB |
|---|---|---|---|---|
| Mild, ~235 MPa | St3sp | S235JR | A36 (250) | Q235B |
| Mid, 275 MPa | – | S275JR | – | Q275 |
| High, ~355 MPa | 09G2S (345) | S355JR / J2 | A572 Gr50 (345) | Q355B |
Theoretical and delivered weight
Multiply the nominal table weight by the ordered length or area to estimate theoretical mass. Delivered mass can vary with manufacturing tolerances. Confirm whether the quotation and invoice use theoretical or weighed mass.
Galvanised weight
Hot-dip galvanising coats every surface, so it adds more to light, thin sections than to heavy ones: roughly 1.5% on heavy plate, up to 8 to 10% on a light angle or thin tube. Compare galvanised to galvanised. Minimum coating per EN ISO 1461:
| Steel thickness | Mean coatingµm | Mean coatingg/m² per side |
|---|---|---|
| over 6 mm | 85 | 610 |
| 3 to 6 mm | 70 | 505 |
| 1.5 to 3 mm | 55 | 395 |
| under 1.5 mm | 45 | 325 |
Need a size or standard not listed?
We hold no stock yard, so we are not limited to one. Send the designation from your drawing and we will source the square hollow section to it.