How It’s Made

Step 1

Making Steel


BlueScope, headquartered in Australia, is one of the world’s leading producers of innovative steel materials.

A photo of the Port Kembla Steelworks

Raw materials such as Iron Ore, Coking Coal and Flux are combined at incredibly high temperatures to produce steel materials for all purposes, including structural & reinforcing products, steel slabs, plates and rolled strip in various grades and gauges.

A photo of a coal loader at BlueScope Steel's Port Kembla steelworks

Step 2

Metallic Coating & Painting


Metallic coatings of zinc or aluminium/zinc/magnesium alloy are applied to cold-rolled strip to produce galvanised and ZINCALUME® steel, providing effective protection against corrosion. Different thicknesses of steel substrate and specialised coatings can be combined to provide even more protection for especially challenging environments.

A photo of cold-rolled strip with metallic coating being applied

The coated steel can be then prepainted on high-speed continuous strip coating lines to produce COLORBOND® steel in its famous range of finishes & colours, each tested to Australia’s unique conditions.

A roll of COLORBOND® steel having just had paint applied

Step 3



LYSAGHT® uses these coils of lightweight coated steel to produce its wide range of building products, shaping them using a process called rollforming. By passing flat sheets of coated steel through a series of specially-designed rollers, the resulting steel products gain their required strength and rigidity.

A rollforming machine producing CUSTOM ORB® corrugated steel cladding

Each arrangement of consecutive rollers produces a different result, producing iconic, industry-standard profiles such as CUSTOM ORB® corrugated roofing, KLIP-LOK® concealed-fix roofing, and BONDEK® composite steel formwork, all proudly made in Australia for more than 100 years.

A photo of a home with a LYSAGHT® steel roof