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Steel Square Bar – Merchant Bar


Steel Square Bar and Billet

InfraBuild Steel Centre supplies steel square bar in a wide range of sizes. Manufactured in Australia from 300PLUS steel, InfraBuild Steel Centre’s steel square bar exceeds the minimum requirements of AS/NZS 3679.1.

Typical Uses

Square merchant bars are used in a vast range of construction and engineering projects, and various market segments including:

  • Commercial and residential construction
  • Civil construction
  • Energy (Wind and Solar)
  • Mining infrastructure
  • Transport and storage
  • Rural
  • Manufacturing


  • Available in a wide variety of sizes
  • Exceeds the minimum requirements of AS/NZS 3679.1
  • Up to 20% stronger for improved strength-to-weight ratios
  • Requires no special pre-heating for welding
  • Additional grades available on request

Relevant Standards

  • AS/NZS 3679.1: Hot-rolled bars and sections
  • AS 1442: Carbon steels and carbon-manganese steels – Hot rolled bars and semi-finished products
  • AS 1444: Wrought alloy steels – Standard, hardenability (H) series and hardened and tempered to designated mechanical properties
  • AS 1447: Hot-rolled spring steels

Does your construction business or engineering firm need steel products? InfraBuild Steel Centre is your trusted supplier, providing delivery services for square merchant bars and other products. We are Australia’s only fully vertically integrated steel manufacturer — producing building and construction products — spanning scrap metal recycling, steel manufacturing and downstream distribution.

Discover our extensive online catalogue today to find the best products, including tubular parts, DuraGal, flat bars and more.

To learn more about our steel products or customise your selection, contact us today, and we would be more than happy to help.

Square Bar – 6m
Size (mm x mm x mm) Mass (kg/m) Metres per tonne
10 x 10 0.81 1266
12 x 12 1.16 885
16 x 16 2.06 498
20 x 20 3.22 318
25 x 25 5.03 204
32 x 32 8.24 124
40 x 40 12.9 79
Billets – 6m
Size (mm x mm x mm) Mass (kg/m) Metres per tonne
45 x 45 16.3 61
50 x 50 27.8 36
63 x 63 31.2 32
75 x 75 45.27 22

InfraBuild Steel Centre can provide the following processing services for this product:

  • Cut-to-length – Our steel square bars and billets are customised and cut to your required length to suit your building and construction needs.

To find out more about the processing services offered by InfraBuild Steel Centre please contact your nearest branch.


InfraBuild Steel Centre can provide delivery services for this product.

Please contact your nearest branch for more information.