Steel Square Tube - Durable Construction Metal for All Uses

Steel square tube is a strong and useful profile that looks like a square or rectangular box of different thickness. It is made from steel and comes in many sizes and types. People use it for building things because it is tough and does not deflect easily. It comes in either a painted finish or galvanised from the factory to prevent rust. Our store also sells stainless steel RHS that an withstand difficult corrosion environments like marine or industrial applications and comes in grades like GR304 and GR316 for different needs. Thickness ranges from 1.6mm to 5mm for light or heavy work and come in a variety of lengths. It is perfect for fabrication projects or big buildings. At Steelmart, we stock a wide range of square tubes, ready for fast delivery across Queensland. Our team can also cut to size to match your site requirements, so you can get straight to work without delay.

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Steel Tubing – Reliable and Ready for Every Project

Steel tubing is like a hollow pipe and can be square or round. It helps make frames and supports in construction and many other applications. You can pick painted, galvanised, or stainless steel members. Galvanised members prevent rust and work outside away from coastal areas. Stainless steel is best near the ocean or you can use a painted section and have it hot-dipped galvanised which gives a better corrosion protection compared to the factory galvanised finish. Sizes start small like 50x25mm and go big to 200x100mm. Our tubes come lengths from 6m up to 12m for efficient transport. They are great for use in buildings, machines, skate ramps, playground equipment, trailers, modular housing or fences.

- High strength for heavy jobs

- Many grades for steel like G350 and GR304 and GR316 for stainless

- Good for inside and outside work

Whether you're working on industrial infrastructure, farm buildings, or DIY home improvements, our precision-cut steel tubing provides the durability and reliability you need. Our fabrication service ensures that we can deliver ready-to-install components, saving you time on-site.

FAQ's

What are the different names for square tube?

A square tube is a collective term for any hollow steel or aluminium section that has four sides. Square Hollow Section (SHS) has equal sides or Rectangular Hollow Section (RHS) has a rectangular profile of dimesions that vary in length and height. The profile has a defined thickness and is hollow so iit looks like a box with no top or bottom.

What are the different types of steel tubing?

Three types are painted, galvanised and stainless steel tubing. Each stops rust in different ways. Painted has basic coating to prevent rust with a light protection. Galvanised has zinc layer for outdoor use. Stainless has a special metal alloy to fight rust best.

Is a square tube stronger than a rectangular tube for steel?

Square tube is often stronger in some directions because all sides are equal. But it depends on thickness and use. Square spreads weight even on all sides. Rectangular is longer one way for special shapes. Pick what fits your project.

What grades are available for stainless steel square tube?

We have GR304 for normal use in things like kitchen equipment an architectural trim whereas GR316 is for marine or high corrosion environments. GR304 is cheaper and works for most jobs. GR316 has more protection from sea or chemicals. Both are strong and shiny for a long time.

How long are the steel tube pieces?

All sizes come in a variety of lengths - commonly, 6m, 8m, 9m, and 12m lengths to fit big projects. This saves cuts and waste on site. You can order full length or we cut for you. Easy to load on truck too.