Australia, Nov. 4 -- Australia's biggest steelworks will produce and deliver thousands of tonnes of steel plate into each Hunter class anti-submarine warfare frigate under a new Framework Agreement that locks in local steel supply over the next five years and underscores the decades-long sovereignty of the nation's naval shipbuilding and steel industries.Steel produced at BlueScope Group's Port Kembla Steelworks in New South Wales is a critical part of the construction of the first of three Hunter class frigates at the Osborne Naval Shipyard in South Australia.The Framework Agreement provides long term stability and continuity for Australian steel plate to be supplied into the ship build, which now has more than 41 of the 78 units for Ship ...