Accession Number : AD0456323

Title :   EFFECTS OF COMPOSITION ON THE MECHANICAL PROPERTIES OF NI-CR-MO-CO FILLER METALS.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Konkol, P. J. ; Rathbone, A. M. ; Stewart, B. K.

Report Date : 01 DEC 1964

Pagination or Media Count : 1

Abstract : Previous studies to develop maraging-steel experimental HY-180/210 filler metals indicated that aluminum and titanium nonmetallic inclusions may significantly reduce the toughness of maraging steel weld metals. Therefore, a program was initiated to determine the effects of composition on the mechanical properties of Ni-Cr-Mo-Co experimental HY-180/210 weld metals that contained no aluminum or titanium. The effects of carbon (0.02 to 0.30%), nickel (4.0 to 20.0%), chromium (0.0 to 6.0%), molybdenum (0.0 to 6.0%), and cobalt (0.0 to 8.0%) on the mechanical properties of 32 statistically selected Ni-Cr-Mo-Co filler metals (deposited with the TIG process) were evaluated. The results indicated that the microstructures of the Ni-Cr-Mo-Co as-deposited weld metals consisted of martensite and retained austenite (0 to 88%) and that large amounts of retained austenite caused a large loss in weldmetal strength and toughness. (Author)

Descriptors :   (*STEEL, WELDING RODS), CHEMICAL ANALYSIS, CARBON ALLOYS, COBALT ALLOYS, CHROMIUM ALLOYS, MOLYBDENUM ALLOYS, NICKEL ALLOYS, MARAGING STEELS, ALUMINUM COMPOUNDS, TITANIUM, NONMETALS, SHIP HULLS, SHIP PLATES, SUBMARINE HULLS, WELDING, WELDS, MECHANICAL PROPERTIES, STATISTICAL ANALYSIS, MICROSTRUCTURE.

Distribution Statement : APPROVED FOR PUBLIC RELEASE