Whyalla Steelworks

Whyalla Steelworks is a major integrated steelmaking complex on the shore of Spencer Gulf at Whyalla, South Australia. Although the supplied brand name is InfraBuild, the authoritative reference subject is the Whyalla Steelworks, the industrial site and steelmaking operation historically associated with BHP, OneSteel, Arrium and Liberty OneSteel. The complex combines iron-ore mining, ironmaking, steelmaking, rolling and distribution, giving it a degree of vertical integration unusual in the Australian steel industry. The operation was developed by the Broken Hill Proprietary Company, later known as BHP. Iron ore extraction in the Middleback Range west of Whyalla began before the steelworks existed. Ore from locations including Iron Knob and Iron Monarch was initially shipped to other Australian industrial centres, but BHP later developed a local ironmaking and steelmaking base. Construction followed an announcement in 1937, supported by infrastructure including the Morgan–Whyalla water pipeline. The first blast furnace was blown in during May 1941. A shipyard was built at the same time, partly to support the wartime requirements of the British Commonwealth and BHP Shipping. Postwar production expanded beyond pig iron. The Whyalla site eventually made rail products, structural steel and other grades used in construction, mining, manufacturing and transport. During the 1960s, the addition of basic oxygen steelmaking facilities, rolling mills and coke ovens enabled the site to operate as a fully integrated works. The shipyard remained important to the town until its closure in 1978, after which approximately 1,800 jobs were lost and Whyalla experienced a severe economic downturn. BHP separated its domestic steel interests into OneSteel in 2000. OneSteel owned the steelworks, Whyalla harbour and associated Middleback Range mining operations. OneSteel later became Arrium. Financial distress led Arrium into voluntary administration in 2016, following reported debts of more than A$4 billion. In September 2017, Liberty House Group, part of Sanjeev Gupta's GFG Alliance, acquired the Arrium mining and steel businesses. The OneSteel brand was subsequently changed to Liberty OneSteel, while the mining business became SIMEC Mining. Under GFG Alliance ownership, the company announced plans to expand output, modernise the plant and develop lower-emissions energy systems. Proposed initiatives included renewable power, battery and pumped-hydro projects, a hydrogen-based pathway to green steel and the use of locally produced energy. Several projects encountered financial, technical or commercial difficulties. The blast furnace experienced major operational interruptions in 2024, while unpaid contractor invoices, coal shortages and wider GFG Alliance financial pressures increased uncertainty around the site. In February 2025, the South Australian Government amended legislation to place OneSteel Manufacturing Pty Ltd into administration, with KordaMentha appointed as administrator. The Australian and South Australian governments announced a joint support package reported at A$2.4 billion for Whyalla and the steelworks. The package was presented as support for the regional economy and continuity of the industrial asset rather than an unconditional bailout of GFG Alliance. Because ownership, operations and the future structure of the works were subject to administration and government intervention, the current status of the brand and operating company requires ongoing review. The complex occupies approximately 1,000 hectares and remains one of Whyalla's largest employers. Its products include rail, billets and structural steel, while its port, internal rail network, utilities and mining connections support the broader operation. The works has also been used for large-ship decommissioning and recycling. It is widely regarded as strategically important to Australian steel supply because it is the country's only manufacturer of rail and has his…

Iron ore mining in the Middleback Range predates the steelworks. Deposits around Iron Knob and nearby locations were developed during the early twentieth century, and the first shipment of Whyalla ore to Port Pirie departed in 1903. BHP later used the region's ore resources as the foundation for a local iron and steel industry. BHP announced the construction of an ironmaking plant in 1937. The project required water, transport, harbour and power infrastructure, including the Morgan–Whyalla pipeline. The first blast furnace began operating in May 1941. A shipyard was built alongside the works and produced vessels for wartime and commercial service. After the Second World War, the site expanded into rail and other steel products, while the shipyard built notable vessels including Iron Yampi, Darling River, Arthur Phillip and Seaway Prince. The shipyard closed in 1978, eliminating approximately 1,800 jobs. The steelworks was progressively modernised during the 1960s. Basic oxygen steelmaking, rolling facilities and coke ovens allowed the operation to control much of the process from ore to finished steel. Blast Furnace No. 1 was eventually closed and demolished, while Blast Furnace No. 2 became the principal operating furnace. The site also developed its own utilities, including power generation using process gases and a seawater reverse-osmosis plant commissioned in 2011. In 2000, BHP spun out OneSteel as a domestically focused steel producer and distributor. OneSteel controlled the Whyalla works, harbour and associated mining assets. The company later adopted the Arrium name. Arrium entered voluntary administration in 2016 after accumulating substantial debt. Following a lengthy sale process, Liberty House Group acquired the mining and steel businesses in 2017. The steel operations were rebranded Liberty OneSteel and the mining assets became SIMEC Mining. GFG Alliance announced a broad transformation program, including increased steel output, plant upgrades and renewable-energy development. It also promoted a transition toward hydrogen and lower-carbon steelmaking. The proposed Cultana Solar Farm was abandoned, and the wider group later faced financing problems, supplier arrears and difficulties affecting the blast furnace. A proposed hydrogen facility was intended to provide energy for green steel, but the project was cancelled in 2025. In February 2025, the South Australian Government used amended legislation to place OneSteel Manufacturing into administration. KordaMentha took control as administrator. The federal and state governments announced a A$2.4 billion support package for Whyalla and the steelworks. The final ownership and operating model remained unsettled, making the present status of the InfraBuild-associated brand and the steelworks subject to review.

1. 2025OneSteel Manufacturing enters administration

   South Australian legislation enabled administration of the operating company, followed by a federal-state support package for the site and region.

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2. 2023Coke ovens close

   The Whyalla coke ovens ceased operation.

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3. 2020Ship-recycling operation begins

   The former shipyard slip was returned to service for large-vessel decommissioning and recycling.

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4. 2017Liberty House acquires the steel business

   Liberty House Group acquired Arrium's mining and steel assets; OneSteel became Liberty OneSteel and the mining arm became SIMEC Mining.

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5. 2016Arrium enters administration

   Arrium entered voluntary administration amid severe financial distress and reported debts exceeding A$4 billion.

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6. 2011Seawater desalination plant commissioned

   A reverse-osmosis plant began supplying up to 1.5 gigalitres of water per year and reduced reliance on Murray River water.

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7. 2000OneSteel spun out from BHP

   BHP separated its domestic steelmaking and distribution business into OneSteel.

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8. 1978Shipyard closes

   BHP's Whyalla shipyard ceased operations, causing substantial local job losses.

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9. 1960Integrated steelmaking capability develops

   Basic oxygen steelmaking, rolling mills and coke ovens were added during the decade, transforming the site into an integrated works.

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10. 1941Steelworks opens

    The first blast furnace was blown in during May, marking the beginning of local ironmaking and steel production.

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11. 1903First recorded sea shipment of Whyalla iron ore

    Iron ore from the Whyalla region was shipped to Port Pirie, establishing the area's role in Australian mineral supply.

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A strategically important Australian integrated steel producer serving construction, infrastructure, mining and rail markets, with a distinctive position based on local iron ore, domestic manufacturing and long-steel expertise.

• RailLong steel

  Whyalla is Australia's only reported manufacturer of rail and has supplied rail products for domestic transport and infrastructure projects. Railmaking is one of the site's defining capabilities and relies on the integrated production of steel billets and downstream rolling.

• Structural steelConstruction steel

  The works produces structural products used in Australian construction, infrastructure, mining and industrial applications. Its domestic position has made the site an important supplier of long and structural steel.

• Steel billetsSemi-finished steel

  A substantial share of crude steel is cast into billets and transferred by rail to downstream Market Mills for further processing into finished products.

• Iron oreRaw material

  Ore from the Middleback Range feeds the steelworks and has historically been shipped through Whyalla harbour. Mining assets associated with the works passed through BHP, OneSteel, Arrium and SIMEC Mining ownership structures.

• 2024Green steel and hydrogen offtake initiative

  Australia

  The South Australian Government and GFG Alliance agreed to explore supplying hydrogen from a proposed state-backed hydrogen facility for use at the steelworks.

  Outcome. The proposed hydrogen facility was cancelled in 2025.

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• 2017Whyalla transformation program

  Australia

  GFG Alliance announced a large investment and modernisation program intended to increase output, lower costs and broaden the site's product range.

  Outcome. The program was affected by later financial, equipment and energy-project difficulties.

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• 2025Government-backed administration and supportOther

  The South Australian Government cited the operating company's financial condition and the strategic importance of the steelworks.

  What changed. Legislation was amended to facilitate administration, while federal and state governments announced a reported A$2.4 billion support package.

  Aftermath. KordaMentha became administrator and the future ownership and operating structure remained under review.

  Joint federal-state support package. A$2.4 billion announced support package (February 2025)

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• 2017Liberty House acquires Arrium steel assetsM&A

  Arrium had been in administration for approximately 14 months after severe financial distress.

  What changed. Liberty House Group acquired Arrium's mining and steel businesses, including the Whyalla works.

  Aftermath. The steel business was renamed Liberty OneSteel and became part of GFG Alliance's industrial strategy.

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• 2000BHP separates domestic steel operationsStrategy

  BHP reorganised its Australian steel interests as the domestic steel industry was separated from the group's broader mining structure.

  What changed. The OneSteel company was created and took control of the Whyalla steel assets.

  Aftermath. OneSteel later became Arrium before entering administration and being sold to Liberty House.

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• 2025Supplier debts and administration crisisControversy

  The steelworks became the focus of public and political concern after reports of unpaid contractors, government royalty arrears and broader GFG Alliance financial problems. The operating company was placed into administration in February 2025.

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• 2025Whyalla Steelworks enters administration amid GFG financial pressure

  South Australian legislation was amended to place OneSteel Manufacturing Pty Ltd, the company operating the steelworks, into administration. KordaMentha was appointed administrator after months of uncertainty involving unpaid debts and supplier concerns.

  BankruptcyRegulation
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• 2025Australian governments announce support package for Whyalla

  The federal and South Australian governments announced a joint support package reported at A$2.4 billion for Whyalla and its steelworks, covering immediate, short-term and longer-term measures.

  RegulationOther
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• 2024Blast furnace disruptions affect production and workforce arrangements

  Technical failures left the blast furnace unavailable for several months, and a later shutdown was attributed to a shortage of coking coal. Some employees experienced reduced shifts and wages during the disruption.

  OtherProduct generation
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• 2021GFG Alliance lender Greensill Capital collapses

  The collapse of major GFG Alliance lender Greensill Capital intensified financial pressure across the group and affected the context in which the Whyalla steel operation was financed and managed.

  BankruptcyOther
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• 2020Large-ship recycling facility recommissioned at Whyalla

  The former shipyard slip was recommissioned for large-ship decommissioning, scrapping and recycling, with capacity reported for vessels exceeding 200 metres.

  Product launchOther
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1. Whyalla Steelworks
2. InfraBuild