Accession Number : AD0881035

Title :   The 10Ni-Cr-Mo-Co Steel Weldment -- Its Fabricability and Structural Suitability for Ultraservice Applications.

Descriptive Note : Progress rept.,

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

Personal Author(s) : Dabkowski, D. S. ; Konkol, P. J. ; Novak, S. R. ; Rathbone, A. M.

Report Date : 31 JUL 1970

Pagination or Media Count : 72

Abstract : Research was conducted to define effects of residual elements on properties of high-yield-strength steels, to study and develop optimum strengthening mechanisms, and to implement extensive base-metal and filler-metal alloy-development programs. As a result of this work, a 10Ni-Cr-Mo-Co steel weldment system has recently been developed that exhibits, at a minimum-yield-strength level of 180 ksi, the excellent toughness, weldability, and stress-corrosion resistance needed for critical hydrospace applications. This report describes the development of the 10Ni-Cr-Mo-Co steel weldment system, with particular emphasis on results of studies of fabrication variables and on evaluation of structural suitability of weldments fabricated by joining heavy-gage plates from production-scale heats. The results of fabricability studies include descriptions of effects of cold and hot forming, heat treating, and welding. The mechanical properties of weldments fabricated by using conventional gas-tungsten-arc (GTA), hot-wire GTA, and electron-beam welding processes are described.

Descriptors :   (*STEEL, WELDING), (*WELDS, STRUCTURAL PROPERTIES), (*SUBMARINE HULLS, WELDS), NICKEL ALLOYS, CHROMIUM ALLOYS, MOLYBDENUM ALLOYS, COBALT ALLOYS, TOUGHNESS, WELDABILITY, STRESS CORROSION, CORROSION INHIBITION, YIELD POINT, INERT GAS WELDING, WIRE, ELECTRON BEAM WELDING, MECHANICAL PROPERTIES, FILLING, MARTENSITE, MARAGING STEELS, CARBON, ALUMINUM, DEEP SUBMERGENCE, TITANIUM, VACUUM FURNACES, UNDERWATER VEHICLES.

Subject Categories : Properties of Metals and Alloys
      Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE