Accession Number : AD0488837

Title :   WELDING HIGH-STRENGTH STEELS,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OH DEFENSE METALS INFORMATION CENTER

Personal Author(s) : Kammer, P. A. ; Martin, D. C.

Report Date : 15 JUL 1966

Pagination or Media Count : 60

Abstract : Recent studies of the developments in welding steels with yield strengths greater than 150 ksi have included low-alloy martensitic steels, medium-alloy martensitic steels, nickel maraging steels, and bainitic steels. Only weldments from medium-alloy martensitic steels and nickel maraging steels have mechanical properties approaching those of the base plate without a complete postweld heat treatment. The most serious problem with the other steel is low toughness in the weld fusion zone. Adequate weld metal toughness under conditions of elastic strain can be obtarined over the entire 150 to 225 ksi yield-strength range only if the tungsten-arc welding process is used. Processes with higher deposition rates can produce comparable weld deposits only in the lower portion of the range. Above a yield strength of 200 ksi, 18Ni maraging steel weldments have the best combination of strength and toughness. Below 200 ksi, the HP 9-4-25 medium-alloy martensitic steel and 12Ni maraging steel weldments have nearly equal properties.

Descriptors :   (*STEEL, WELDING), MARAGING STEELS, NICKEL ALLOYS, BAINITE, MARTENSITE, TOUGHNESS, WELDS, FRACTURE(MECHANICS), FATIGUE(MECHANICS), INERT GAS WELDING, TUNGSTEN, ARC WELDING, ELECTRON BEAM WELDING, TENSILE PROPERTIES, IMPACT TESTS, CHROMIUM ALLOYS, MOLYBDENUM ALLOYS, WELDING RODS, ADDITIVES, ALUMINUM, TITANIUM, VANADIUM ALLOYS, HEAT TREATMENT, SUBMARINE HULLS.

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE