Accession Number : AD0456518


Title :   EFFECTS OF COMPOSITION ON HEAT-AFFECTED-ZONE CRACKING OF NI-CR-MO STEEL WELDMENTS--II.


Descriptive Note : Technical rept.,


Corporate Author : UNITED STATES STEEL CORP MONROEVILLE PA APPLIED RESEARCH LAB


Personal Author(s) : Connor, L P ; Stewart, B K


Report Date : 01 Dec 1964


Pagination or Media Count : 1


Abstract : Welding studies associated with the development of an HY-130/150 submarine-hull steel were designed to define the composition limits within which Ni-Cr-Mo steels will exhibit a minimum susceptibility to weld-heat-affected-zone cracking. The studies comprised two statistically designed experiments. The results of the first experiment in which 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%) were studied, indicated that increased carbon, manganese, and nickel contents increased crack susceptibility but that increased phosphorus and sulfur contents did not. A second statistical program was undertaken to determine the effects of carbon (0.10 to 0.20%), manganese (0.50 to 1.30%), chromium (0.60 to 2.00%), molybdenum (0.30 to 0.90%), and vanadium (residual to 0.07%) on weld-heat-affected-zone cracking in cruciform tests of 22 statistically selected 5NiCr-Mo steels. The results of the second study indicated that an increase in carbon content strongly increased crack susceptibility, an increase in manganese and chromium moderately increased crack susceptibility, but that an increase in molybdenum and vanadium contents did not significantly influence crack susceptibility.(Author)


Descriptors :   *STEEL , WELDS , FRACTURE(MECHANICS) , CHEMICAL PROPERTIES , STATISTICAL ANALYSIS , SHIP HULLS , SHIP PLATES , SUBMARINE HULLS


Distribution Statement : APPROVED FOR PUBLIC RELEASE