Reduce naval ship fabrication costs by eliminating costly rework and possible in-service failures due to hydrogen-assisted cracking (HAC) in high-strength steel castings and by eliminating preheat of high-strength steel castings and forgings during welding.
Mitigation of HAC will reduce costly rework and possible in-service failures. Reduced preheat cost should save about $1.6 million per year. More easily processed alloys should reduce production risk and broaden supplier base; a 5-percent acquisition savings ($110,000 per year) is expected due to increased competition.
NAVSEA will certify the alternate casting and forging compositions for use in ship construction, overhaul or repair. The NCEMT will provide technical input for certification including information on processing, mechanical properties and weldability.