December 11, 2023

Industry News

Bisalloy Contracts For Australian SSN-AUKUS Hull Steel Qualification

The Australian Submarine Agency has entered into a contract with Bisalloy Steels for the qualification of Australian steel for use on Australia’s SSN-AUKUS conventionally- armed, nuclear-powered submarines. The contract is for a term of approximately 16 months. The comprehensive qualification process, involving more than 4500 tests, is expected to be completed in the first half of 2025.

Bisalloy Steels will perform the advanced heat treatment process on the raw plate steel to produce high-grade, submarine-pressure hull steel that meets or exceeds both the UK and US standards. The raw plate steel will be supplied by BlueScope Steel. Not only will the steel produced under this contract be used for qualification purposes, it will also be used to develop the necessary welding procedures, and will be used in early production demonstration activities occurring ahead of the commencement of construction of Australia’s first SSN-AUKUS submarine later this decade.

The Minister for Defence Industry, the Hon Pat Conroy MP, said: “The qualification of Australian steel is an important step in the Australian Government’s strategy for acquiring state-of-the-art conventionally-armed, nuclear-powered submarines.”

Bisalloy Steel Group Managing Director and CEO, Rowan Melrose, said: “Bisalloy is very pleased to reach an agreement with the Commonwealth to supply plates for grade qualification to the UK and US naval hull plate standards.

“This is a significant announcement for Bisalloy as it highlights the quality of our products, our ability to deliver to the highest standards, and the recognition and trust of a long-standing supply relationship with Australia’s Defence industry. This is a great outcome for Bisalloy, the Illawarra region and Australian manufacturing.”

For further information, contact the Bisalloy Steels website: