HSS & Mechanical Tubing technical data sheet
PDF · compiled by Tas & Zaz from the represented mill’s published data
Tube · Hollow structural sections
HSS & Mechanical Tubing
Square and rectangular hollow structural sections (HSS) to ASTM A500 Gr. B and Gr. C, from 4" × 4" to 16" × 16" and 6" × 4" to 12" × 8", with walls from 3/16" to 5/8". Also available to CSA G40.21 350W. Light-gauge and round mechanical tubing complete the range.
- ASTM A500 Gr. B / Gr. C
- CSA G40.21 350W
- Square 4"–16"
- Rectangular 6 × 4"–12 × 8"
- Light-gauge from ¾"
Overview
At a glance
- Square HSS
- 4" × 4" to 16" × 16"; walls 3/16" to 5/8" (4.78 to 15.88 mm)
- Rectangular HSS
- 6" × 4" to 12" × 8"; walls 3/16" to 1/2" (4.78 to 12.70 mm)
- Specification
- ASTM A500 Gr. B / Gr. C
- Length
- 12.20 m pieces (weights published per piece)
- Light-gauge tubing
- Square ¾" to 5"; rectangular 2" × 1" to 6" × 2"; walls from 0.060"
- Mechanical tubing
- Square, rectangular and round (O.D. 1.25" to 4.5")
- Special sizes
- On request
Why specify HSS
High strength-to-weight ratio
High radii of gyration about both axes give strong compression performance and significant weight savings.
Clean architectural look
Flat sides, rounded corners and a closed section suit exposed structures.
Less surface to coat
Rectangular and square HSS have about two-thirds of the surface area of an open section of comparable capacity: less surface preparation, paint and fireproofing.
Closed section
Good resistance to torsion, and fewer surfaces for dust and debris where cleanliness matters.
Hollow structural sections
Square and rectangular HSS to ASTM A500
4" × 4" to 16" × 16" square and 6" × 4" to 12" × 8" rectangular, plus light-gauge and mechanical tubing.
Steel roof framing · Photo: Zemangroup · CC BY-SA 4.0
Technical data
Specifications
Weights per metre, per 12.20 m piece and per bundle for every published HSS size, plus light-gauge and mechanical tubing ranges. Also available to CSA G40.21 350W.
| Wall (in) | Wall (mm) | kg/m | kg per 12.20 m piece | Pieces per bundle | kg per bundle |
|---|---|---|---|---|---|
| HSS 4" × 4" (101.6 mm) | |||||
| 3/16" (0.188) | 4.78 | 14.019 | 171 | 16 | 2,736 |
| 1/4" (0.250) | 6.35 | 18.170 | 222 | 16 | 3,552 |
| 5/16" (0.312) | 7.92 | 22.069 | 269 | 16 | 4,304 |
| 3/8" (0.375) | 9.53 | 25.701 | 314 | 16 | 5,024 |
| HSS 5" × 5" (127 mm) | |||||
| 3/16" (0.188) | 4.78 | 17.813 | 217 | 9 | 1,953 |
| 1/4" (0.250) | 6.35 | 23.245 | 284 | 9 | 2,556 |
| 5/16" (0.312) | 7.92 | 28.394 | 346 | 9 | 3,114 |
| 3/8" (0.375) | 9.53 | 33.290 | 406 | 9 | 3,654 |
| HSS 6" × 6" (152.4 mm) | |||||
| 3/16" (0.188) | 4.78 | 21.623 | 264 | 9 | 2,376 |
| 1/4" (0.250) | 6.35 | 28.305 | 345 | 9 | 3,105 |
| 5/16" (0.312) | 7.92 | 34.734 | 424 | 9 | 3,816 |
| 3/8" (0.375) | 9.53 | 40.895 | 499 | 9 | 4,491 |
| 1/2" (0.500) | 12.70 | 52.44 | 640 | 9 | 5,760 |
| HSS 8" × 8" (203.2 mm) | |||||
| 3/16" (0.188) | 4.78 | 29.213 | 355 | per piece | — |
| 1/4" (0.250) | 6.35 | 38.424 | 469 | per piece | — |
| 5/16" (0.312) | 7.92 | 47.383 | 578 | per piece | — |
| 3/8" (0.375) | 9.53 | 56.089 | 684 | per piece | — |
| 1/2" (0.500) | 12.70 | 72.697 | 887 | per piece | — |
| 5/8" (0.625) | 15.88 | 88.27 | 1,077 | per piece | — |
| HSS 10" × 10" (254 mm) | |||||
| 3/16" (0.188) | 4.78 | 36.802 | 449 | per piece | — |
| 1/4" (0.250) | 6.35 | 48.559 | 592 | per piece | — |
| 5/16" (0.312) | 7.92 | 60.047 | 733 | per piece | — |
| 3/8" (0.375) | 9.53 | 71.283 | 870 | per piece | — |
| 1/2" (0.500) | 12.70 | 92.951 | 1,134 | per piece | — |
| 5/8" (0.625) | 15.88 | 113.58 | 1,386 | per piece | — |
| HSS 12" × 12" (304.8 mm) | |||||
| 1/4" (0.250) | 6.35 | 58.678 | 716 | per piece | — |
| 5/16" (0.312) | 7.92 | 72.712 | 887 | per piece | — |
| 3/8" (0.375) | 9.53 | 86.462 | 1,055 | per piece | — |
| 1/2" (0.500) | 12.70 | 113.205 | 1,381 | per piece | — |
| 5/8" (0.625) | 15.88 | 138.905 | 1,695 | per piece | — |
| HSS 14" × 14" (355.6 mm) | |||||
| 5/16" (0.312) | 7.92 | 85.361 | 1,041 | per piece | — |
| 3/8" (0.375) | 9.53 | 101.656 | 1,240 | per piece | — |
| 1/2" (0.500) | 12.70 | 133.459 | 1,628 | per piece | — |
| 5/8" (0.625) | 15.88 | 164.234 | 2,004 | per piece | — |
| HSS 16" × 16" (406.4 mm) | |||||
| 5/16" (0.312) | 7.92 | 98.025 | 1,196 | per piece | — |
| 3/8" (0.375) | 9.53 | 116.851 | 1,426 | per piece | — |
| 1/2" (0.500) | 12.70 | 153.727 | 1,875 | per piece | — |
| 5/8" (0.625) | 15.88 | 189.547 | 2,312 | per piece | — |
| Wall (in) | Wall (mm) | kg/m | kg per 12.20 m piece | Pieces per bundle | kg per bundle |
|---|---|---|---|---|---|
| HSS 6" × 4" (152.4 × 101.6 mm) | |||||
| 3/16" (0.188) | 4.78 | 17.813 | 217 | 9 | 1,953 |
| 1/4" (0.250) | 6.35 | 23.245 | 284 | 9 | 2,556 |
| 5/16" (0.312) | 7.92 | 28.394 | 346 | 9 | 3,114 |
| 3/8" (0.375) | 9.53 | 33.290 | 406 | 9 | 3,654 |
| HSS 8" × 4" (203.2 × 101.6 mm) | |||||
| 3/16" (0.188) | 4.78 | 21.623 | 264 | 6 | 1,584 |
| 1/4" (0.250) | 6.35 | 28.310 | 345 | 6 | 2,070 |
| 5/16" (0.312) | 7.92 | 34.734 | 424 | 6 | 2,544 |
| 3/8" (0.375) | 9.53 | 40.895 | 499 | 6 | 2,994 |
| HSS 10" × 6" (254 × 152.4 mm) | |||||
| 3/16" (0.188) | 4.78 | 29.213 | 356 | 4 | 1,424 |
| 1/4" (0.250) | 6.35 | 38.424 | 469 | 4 | 1,876 |
| 5/16" (0.312) | 7.92 | 47.383 | 578 | 4 | 2,312 |
| 3/8" (0.375) | 9.53 | 56.089 | 684 | 4 | 2,736 |
| 1/2" (0.500) | 12.70 | 72.697 | 887 | 4 | 3,548 |
| HSS 12" × 8" (304.8 × 203.2 mm) | |||||
| 1/4" (0.250) | 6.35 | 48.559 | 592 | per piece | — |
| 5/16" (0.312) | 7.92 | 60.047 | 732 | per piece | — |
| 3/8" (0.375) | 9.53 | 71.283 | 870 | per piece | — |
| 1/2" (0.500) | 12.70 | 92.951 | 1,134 | per piece | — |
Weights as published for 12.20 m pieces. Larger sizes are sold by the piece (“per piece”). Special sizes on request.
| Size (in) | Wall thicknesses listed (in) |
|---|---|
| ¾ × ¾ | 0.060*, 0.075 |
| 1 × 1 | 0.060, 0.075, 0.105, 0.120, 0.135 |
| 1¼ × 1¼ | 0.060, 0.075, 0.105, 0.120* |
| 1½ × 1½ | 0.060, 0.075, 0.105, 0.120, 0.135 |
| 2 × 2 | 0.060, 0.075, 0.105, 0.120, 0.135, 0.150, 0.188 |
| 2½ × 2½ | 0.075, 0.120, 0.135, 0.188, 0.250* |
| 3 × 3 | 0.075, 0.120, 0.135, 0.150, 0.188, 0.250 |
| 3½ × 3½ | 0.075, 0.120, 0.188, 0.250 |
| 4 × 4 | 0.075, 0.120, 0.135, 0.150, 0.188, 0.250 |
| 5 × 5 | 0.188, 0.250 |
| Size (in) | Wall thicknesses listed (in) |
|---|---|
| 2 × 1 | 0.060, 0.075, 0.120* |
| 2½ × 1½ | 0.075 |
| 3 × 1½ | 0.075 |
| 3 × 2 | 0.075, 0.105*, 0.120, 0.135, 0.150, 0.188, 0.250 |
| 4 × 2 | 0.075, 0.120, 0.135, 0.150, 0.188, 0.250 |
| 4 × 3 | 0.075, 0.120, 0.150, 0.188, 0.250 |
| 5 × 3 | 0.120, 0.188, 0.250 |
| 6 × 2 | 0.075, 0.120, 0.188, 0.250 |
Published lengths: 6.00 m for gauge walls and 6.10 m for 3/16" and 1/4" walls. Items marked * are flagged on the published table; confirm availability with your quote.
| Product | Range as published |
|---|---|
| Square mechanical tubing | ¾" × ¾" to 4" × 4" |
| Rectangular mechanical tubing | Up to 6" × 2" |
| Round mechanical tubing | O.D. 1.25", 1.315", 1.5", 1.66", 1.9", 2", 2.375", 2.875", 3.5" and 4.5"; walls 0.060" to 0.173" |
| Lengths | 20 to 40 ft, depending on size |
Ranges as published in the represented mill’s mechanical tubing catalogue. Confirm current sizes, gauges and lengths with your quote.
Specifications as published by the mill we represent (accessed October 2026). The mill’s current data and your written quote prevail. Final selection is the responsibility of your engineer or specifier.
Applications
Where HSS and tubing are used
-
Light structuresSteel truss roof · Photo: Henk Monster · CC BY 3.0 -
ConstructionSteel-framed building under construction · Photo: Dwight Burdette · CC BY 3.0 -
InfrastructureSteel frame under construction · Photo: Svetlov Artem · CC BY 3.0
- Construction
- Light structures and greenhouses
- Agriculture
- Heavy machinery
- Transportation
- Infrastructure and energy
- Office equipment
- Recreational vehicles
Application photos are illustrative and don’t show Tas & Zaz projects or customers.
Gallery
HSS & Mechanical Tubing in pictures
-
Rectangular steel tubingPhoto: Shixart1985 · CC BY 2.0 -
Rectangular tubing -
Square HSS bundle -
Rectangular and square HSS -
Light-gauge square tubing
Photos show the product category and are representative; they are not photos of a Tas & Zaz facility.
Mill representatives
Quoted by the mill, handled locally
Your request goes to the Mexican mill we represent. Its written quote comes to you through Tas & Zaz, your local contact in Canada and the USA.
Hot rolling in a steel mill · Photo: Adrian Tync · CC BY-SA 4.0
Downloads
Technical documents
The mill’s current documentation
Need the mill’s own published data sheet for this product? Ask us with your quote request.
Request a HSS & tubing quote
Give the size and wall (for example “HSS 6 × 6 × 1/4, 12.20 m”), specification, quantity, destination and required-by date.
Related products
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Straight-seam ERW pipe, NPS 4" to 20", for conveyance and structural use.
Steel Plate
A-36, A-283, A-285, A-516, A-572, A-709 and SA 516 plate, 5/16" to 4" thick.
Merchant Bars
Hot-rolled angles, flat bar, round bar, square bar and channels.
Photo credits
- Steel truss roof: photo by Henk Monster, Wikimedia Commons, CC BY 3.0. Resized/cropped.
- Rectangular steel tubing: photo by Shixart1985, Wikimedia Commons, CC BY 2.0. Resized/cropped.
- Steel roof framing: photo by Zemangroup, Wikimedia Commons, CC BY-SA 4.0. Resized/cropped.
- Steel-framed building under construction: photo by Dwight Burdette, Wikimedia Commons, CC BY 3.0. Resized/cropped.
- Steel frame under construction: photo by Svetlov Artem, Wikimedia Commons, CC BY 3.0. Resized/cropped.
- Hot rolling in a steel mill: photo by Adrian Tync, Wikimedia Commons, CC BY-SA 4.0. Resized/cropped.
- Steel pipe: photo by Chris Heaton, Wikimedia Commons, CC BY-SA 2.0. Resized/cropped.
- Angles, channels, beams, flats, rounds and tubes: photo by Steel Construction (Wikimedia Commons), Wikimedia Commons, Public domain. Resized/cropped.
Other product photos: images published by the mills and manufacturers we represent, or from the current Tas & Zaz website. All photos are illustrative and do not show Tas & Zaz facilities, projects or customers.