Accession Number : AD0616930

Title :   PRELIMINARY EVALUATION OF INTERRUPTEDARC WELDMENTS.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Connor,L. P. ; Rathbone,A. M.

Report Date : 01 MAR 1965

Pagination or Media Count : 28

Abstract : A study was made in which experimental interruptedarc HY-130/150 weldments were fabricated in the vertical-up position by welders having different levels of experience and with two different shielding-gas mixtures. The desired mechanical properties of the interrupted-arch weld metal (140 ksi yield strength and 50 ft-lb energy absorption at 0 F) were achieved and no significant difference was observed in soundness or properties between weldments fabricated by an experienced interrupted-arc welder and weldments fabricated by experienced covered-electrode welders trained in interrupted-arc welding for about one week. The study also indicated that carbon dioxide in the shielding gas does not have significant deleterious effects on weld-metal mechanical properties. Therefore, moderate quantities of carbon dioxide (about 10 percent) can be effectively used to increase arc penetration. In general, the present results indicate that satisfactory mechanical properties and soundness can be obtained in out-of-position interrupted-arc HY-130/150 weldments, and that the interrupted-arc process can be effectively used for shipyard construction. (Author)

Descriptors :   (*STEEL, WELDS), (*SUBMARINE HULLS, METAL PLATES), (*WELDING, STEEL), NICKEL ALLOYS, CHROMIUM ALLOYS, MOLYBDENUM ALLOYS, VANADIUM ALLOYS, WELDING RODS, MANGANESE ALLOYS, MECHANICAL PROPERTIES, CARBON DIOXIDE, ELECTRIC ARCS, GASES, MICROSTRUCTURE, TOUGHNESS

Distribution Statement : APPROVED FOR PUBLIC RELEASE