OneSteel Manufacturing Pty Ltd (Administrators Appointed) (OneSteel) is Australia’s only fully integrated mining and steel manufacturing business, operating critical assets that form the backbone of the nation’s industrial capability. With operations spanning the Middleback Ranges mining precinct through to primary and secondary steelmaking at the Whyalla Steelworks, OneSteel manages the complete value chain from resource extraction to finished steel products used in infrastructure, transport, construction and defence.

Our mining operations supply the iron ore that feeds our iron and steelmaking processes, ensuring a secure, consistent and high-quality ore supply for domestic production. At the Whyalla Steelworks, we produce specialised billet, rail and long steel products that support major national projects across rail networks, building and construction, agriculture, manufacturing and energy. This integrated model gives OneSteel unique strength in reliability, responsiveness and product quality.

OneSteel plays a vital role in maintaining Australia’s sovereign steelmaking capability at a time when secure local supply chains are more important than ever. Our operations support thousands of jobs across South Australia, underpinning the regional Whyalla community and contributing significantly to the state and national economy. We are committed to safe, sustainable operations, investing in technology, process improvement and environmental performance as we transition to the future of steelmaking.

As the business undergoes transformation, OneSteel remains focused on stability, continuity and long-term value creation. We work closely with governments, industry partners and our workforce to ensure our operations remain viable, competitive and ready for the next generation of Australian manufacturing. OneSteel is proud to be a business with scale, purpose and national importance, delivering the products, capability and expertise that help build Australia’s future.


OneSteel Manufacturing

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OneSteel Manufacturing

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