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Our steel products

Our steel products

BISALLOY® WEAR steel

BISALLOY® WEAR steel

BISALLOY® WEAR steel provides remarkable hardness and ability to withstand the toughest wear and tear.

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BISALLOY® STRUCTURAL steel

BISALLOY® STRUCTURAL steel

BISALLOY® STRUCTURAL steel delivers weight saving benefits in construction, transport and manufacturing.

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BISALLOY® ARMOUR steel

BISALLOY® ARMOUR steel

BISALLOY® ARMOUR steel has long been chosen to support Australia’s defence forces including Naval, Ballistics,Vehicles

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BISALLOY® PROTECTION steel

BISALLOY® PROTECTION steel

BISALLOY® PROTECTION steel suits a range of applications for the protection of life, valuables and property.

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Range of Grades

Bisalloy Steels produces the BISALLOY® range of quench and tempered performance steels across the three main product areas of:


  • high wear
  • high strength
  • armour & protection grade specialty steels.


Our products are world-class, with our structural grades complying with many of the world’s quenched and tempered steel plate standards.

While each grade has specific mechanical and chemical properties, our process applies to all BISALLOY® steel products manufactured by Bisalloy Steels.

Feed Plate

The technology used in the manufacture of BISALLOY® steel is not only world-class, but the demands of high strength and high hardness steels dictate the need for one of the most stringent process routes used in the manufacture of steel plate, anywhere in the world.


Hot metal desulphurisation ensures low levels of sulphur and other impurities in steelmaking. Vacuum degassing is carried out to reduce the hydrogen content of the steel, while also decreasing the amount of undesirable oxygen and nitrogen in the steel.


Control of impurities is assisted by using hot metal injection and conditioning of the slag during the Basic Oxygen Steelmaking process.


Close control of chemical composition and final microstructure is maintained by using ladle refining with calcium injection, argon bubbling through the heat during steelmaking and alloying additions made under vacuum.


After steelmaking, the slab product integrity is ensured by using electromagnetic stirring, continuous casting and controlled cooling of slabs prior to plate rolling.


Finally, plate rolling is carried out in a computer controlled four-high rolling mill in which each draft is modified during rolling for optimisation of final properties.


The net result is steel that provides improved toughness, structural integrity and fatigue resistance. This ensures consistent product performance in service.

Heat Treatment Process

Plate is heated in our natural gas fired furnace before quenching in the Drever roller quench unit. Complete PLC control allows tight and consistent control of all furnace and quench operations, including:

  • water flow rates and pressure
  • furnace temperatures
  • residence times


Pre- and post-heat treatment shot blasting removes scale and presents an attractive plate. This improves product properties, welding and cutting, as well as simplification during fabrication.


The final operation is plate levelling, through our plate leveller, for material up to 32 mm thick. This significantly improves flatness of plate to market – much tighter than the Australian Standard and other International Standards.


Our quality assurance system ensures that full traceability, from initial steelmaking right through the process to the final plate. Each plate is individually hard stamped with a unique identification that links to the overall traceability.


All plates are tested for hardness, with structural grades tested in Bisalloy Steels’ NATA approved mechanical testing laboratory, and plates of all grades are certified.


The entire process is carried out in compliance with ISO9001, certified by Lloyd’s Register Quality Assurance (LRQA).

Technical Development

Each of the gradesBisalloy Steels produces have been developed to optimise chemistry and mechanical properties together with our heat treatment process.


Our world-class steel grades ensure that properties such as ductility, weldability and toughness are maximised, while also complying with the requisite hardness and strength requirements.


Continuous, committed research and development at Bisalloy Steels keeps our quenched and tempered steel product range at the leading edge of steel technology.


We are developing steels to meet the emerging requirements for stronger structural grades. We will release these products based on market demand.