Midalia Steel is Western Australia’s premier supplier of steel products and has been operating since 1951.

With 11 branches across the state, Midalia Steel is a major supplier to the ‘DIY’, fabrication, manufacturing and building markets. Providing an extensive range of products for most projects in steel.


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DIY Guides

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The Colorbond® Steel Colour Palette

Colorbond® steel offers a modern range of designer colours for Roofing, Walling, Guttering, Downpipes and Fascia as part of the standard range.

The colours shown represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing, as varying screens and devices may affect colour tones and finishes.

DIY Guides

Midalia Steel is your partner in DIY

That’s why we’ve come up with this series of handy reference guides to provide you with some information about the basics of building with steel.

We hope they’re useful, however please remember, if in doubt get the expert advice of a tradesperson or building engineer and always ensure that you have the relevant local Council approvals before you start work.

How to DIY manual

This booklet is intended as general information only and is not intended to be a complete or definitive guide.

Safety Products

Midalia steel now offer a great range of safety gear to help keep you safe when you’re on the job…

OZ Profile

Oz Profile Information (Flats, Angles & Channels with Duragal® Platinum® Coating)

DuraGal Easy Welding Guide

To provide general guidance and hints on joint preparation, consumable selectionand indicative machine settings for the welding and fabrication.

DuraGal Easy Painting & Corrosion Protection Guide

This guide is designed to cover, in a practical and concise form, paint systems for a wide range of environments, performance levels. pre-treatments and application methods.

WA OZLintel Span Tables

WA OZLintel Span Tables have been developed to meet the unique and specific lintel size range used in the Western Australian building industry.

Telescoping Tables for RHS & SHS Sections

Technical Information

Design Capacity Tables for Structural Steel Hollow Sections

Technical Information

Product Brochures

Find all the information your need about our products from our products brochures library. Simply click on the image to download the brochure.

We are currently building our libary so it you cant find what your looking for, please contact us.

Why Choose Us

Supplying Steel Since 1951

In August 1951, with only £92 of capital Roy & Leon Midalia set up Midalia Bros with a 6m x 12m shed and one truck.

In-House Processing

Our in-house processing capabilities include Oxy Profiler, HD Plasma, HD Drill & Bevel Plasma, Beamline, Bandsaws.

Secure Order Online

Rest assured your information is kept safe and secure when you order steel products online.

Delivered To Your Door

Every one of our products can be cut to size and delivered right to your doorstep so sit back and get your steel delivered.