Bisalloy Steels

Quenched and Tempered Armour Steel Plate for the Defence Industry

Bisalloy Steels

Bisalloy Steels is Australia's only quenched and tempered armour steel plate manufacturer.

The company's specialised processes strengthen and harden the specially alloyed steel plate, adding two essential steps: quenching and tempering.

Armoured vehicle protection for military applications

Despite harder and stronger steel being highly desirable within a defence application, the tempering process creates a more ductile steel plate. The toughness of Bisalloy's armour grades range means an even greater resistance to kinetic projectiles and blasts.

That is why quenched and tempered armour steel proves particularly useful within armoured vehicle protection. Fabrication considerations such as cutting, drilling and forming / rolling are significantly not compromised. Overall, the combined processes of quenching and tempering, together with a specialised and highly refined alloying, produce more resilient armour steel that also remains weldable, ductile and tough.

Steel armour plate for APC and LAV hull applications

Bisalloy Steels is currently supplying the Bushmaster Infantry Mobility Vehicle's steel armour plate, as well as for a number of other light armoured vehicles (LAVs) and armoured personnel carriers (APCs) being manufactured worldwide. Typical applications are hulls in LAVs and APCs.

Bisalloy additionally supplies armour plate to police and military forces, governments and civilian applications worldwide, as well as armoured vehicle manufacturers for security booths and vehicles, splinter boxes, training facilities, embassy 'safe rooms' and various other applications.

Bisalloy Steels is an approved facility to manufacture armour steel plates by defence authority in various countries including Australia and the US. The company's armour plates comply with US MIL-DTL standards, which are being used as the specifications for the manufacture of armour steel plates worldwide.

Tough armour grades for ballistic projectile resistance

Bisalloy manufactures a range of armour grades to suit different specific applications. The grades varies from less hard but tough for blast application, hard and tough for a combined resistance to both shock and penetration, to very high hardness plates to provide resistance to ballistic projectiles.

Overall, Bisalloy produces six armour grades: Bisplate Ultra High Hardness (UHH) (MIL-DTL-32332), Bisplate High Hardness Armour (HHA) (MIL-DTL-46100), Bisplate Ultra High Toughness (UHTA) (MIL-DTL-12560 Cl. 4), Bisplate High Toughness Armour (HTA), Bisplate High Impact Armour Cl. 1 (HIA1) (MIL-DTL-12560 Cl.1) and Bisplate High Impact Armour Cl. 2 (HIA2) (MIL-DTL-12560 Cl. 2).

About Bisalloy Steels

Bisalloy Steels is the sole Australian manufacturer of abrasion-resistant, high-tensile quenched and tempered steel plate for armour, structural and wear-resistant steel applications. These are marketed under the brand name BISALLOY® and exported to a range of countries worldwide.

From its base in Unanderra, just below Sydney, Bisalloy Steels manufactures its products efficiently and continuously. Since its operation in 1980, Bisalloy Steels has acquired an excellent global international reputation for its high-quality products and technical backup.

The company is a specialist performance steel manufacturer and supplier very responsive to customer demands and worldwide market changes, as well as being extremely committed to, and clearly focused on continuous product development and improvement.

Bisalloy Steels supplies end-users and manufacturers within various industries, including defence, pressure vessel, general fabrication, construction and mining. The company distributes its products through an Australian network directly to end users, through international agents and its businesses in Indonesia, Thailand and the People's Republic of China.

Bisalloy Steel Group comprises Bisalloy Steels in Australia, distribution businesses in Indonesia (PT Bima Bisalloy) and Thailand (Bisalloy Thailand) and, from July 2011, the investment in the Chinese CJV - Bisalloy Jigang (Shandong) Steel Plate Co.

The Group's main focus is on its quenched and tempered steel plate production processes and leveraging off its significant intellectual property associated with the formulation of the raw material input ('green feed').

The intellectual property's primary value has so far been delivered through the production of BISALLOY® quenched and tempered steel plate from Bisalloy Steels' Unanderra production facility, but the ability to replicate and build upon it is now proven through the joint venture in China.

Contact Details

Bisalloy Steels
18 Resolution Drive
NSW 2526
New South Wales
+61 02 4272 0444
+61 02 4272 0400

Available White Papers


Bisalloy Technical Guide to Armour Plate Fabrication 04 September 2017 All grades of BISALLOY® Armour steel can be readily welded using conventional low hydrogen MMAW and GMAW welding consumables and processes.


BISALLOY® Protection Steel 21 August 2017 As a specialist supplier of quenched and tempered steel plate, Bisalloy is highly responsive and agile in partnering with our customers to meet their demands, specialised needs and market challenges in Australia and across the globe.


BISALLOY® Armour Plate Steel 02 August 2017 Since 1980, Bisalloy has proudly been Australia's only manufacturer of quenched and tempered steel plate used for armour, structural and wear-resistant steel applications and has established an outstanding international reputation for quality products and technical support.


Bisalloy Armour Plate Steel Brochure 24 October 2016 Bisalloy Steels has been Australia's sole manufacturer of quenched and tempered steel plate used for armour, structural and wear-resistant steel applications since 1980, and has established an excellent international reputation for quality products and technical support.