EFFECTS OF COMPOSITION ON HEAT-AFFECTED-ZONE CRACKING OF NI-CR-MO STEEL WELDMENTS-I.
UNITED STATES STEEL CORP PITTSBURGH PA
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Because cracking problems were encountered during the welding of the first HY-80 steel submarine hulls, the program to develop an HY-130150 submarine-hull weldment was designed to include a comprehensive investigation of the composition limits within which an HY-130150 steel will exhibit minimum susceptibility to weld-heataffected-zone cracking. Therefore, a statistically designed program was initiated to determine the effects of carbon 0.05 to 0.21, manganese 0.30 to 1.50, phosphorus 0.003 to 0.027, sulfur 0.003 to 0.027, and nickel 1.00 to 9.00 on the weld-heat-affected-zone cracking of Laboratory cruciform specimens fabricated from 32 experimental Ni-Cr-Mo steels 1.3 Cr and 0.6 Mo. Author