Results of an investigation of some 400 heats of steel to investigate the effects of variations in composition and deoxidation practice on the fracture characteristics of ship plate steel.Late in 1949, on the recommendation of the Committee on Ship Steel of the National Academy of Sciences-National Research Council, the Ship Structure Committee established Project SR-110 to investigate the effects of variations in composition on the fracture characteristics of ship plate steel.An advisory committee was appointed by the Committee on Ship Steel to guide the study and review the findings.