INVESTIGATION OF STEELS FOR IMPROVED WELDABILITY IN SHIP CONSTRUCTION - PHASE 1.

This report covers the first phase of a three-year study to select the optimum materials and welding parameters to improve resistance to degradation of the heat-affected-zone properties in weldments made with high-deposition-rate processes. Two production steels and twenty 500-pound laboratory heats of steels of varying chemical compositions reflecting low carbon and sulfur content, silicon-aluminum deoxidation practice, globular sulfides, fine titanium nitrides, and treatments with rare earth metals, boron and calcium have been recommended for further examination.