Twenty-two packages for a range of equipment and services required to deliver the future submarines have been released this month, including valves, fire protection equipment, thermostats, sensors, laboratories and testing.
The RFIs close 30 April.
In a cover letter available to businesses, Naval Group said it is crucial that Australian businesses are capable of meeting the company's "technical, time scale and safety needs".
"The purpose of this RFI is to collect written information from Australian companies on their capability to supply products and technologies required to manufacture and sustain these submarines in Australia," the letter said.
Businesses looking to submit RFIs can access the information on the ICN gateway here.
The latest RFIs come after 15 packages opened in March, 10 in January and 14 opened in November last year.