Accession Number : AD0459669

Title :   EFFECT OF AUSFORMING OF THE MECHANICAL PROPERTIES OF 5 1/2 AND 7 1/2 PERCENT NICKEL SUBMARINE-HULL STEELS.

Descriptive Note : Progress rept.,

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

Personal Author(s) : Dabkowski, D. S. ; Manganello, S. J. ; Porter, L. F.

Report Date : 31 MAY 1963

Pagination or Media Count : 19

Abstract : High-nickel steels, such as the 5 1/2 and 7 1/2 percent nickel steels presently being considered as higher-strength submarine-hull steels, are ideally suited to the thermal-mechanical precess known as ausforming. Accordingly, the Applied Research Laboratory conducted a preliminary investigation on four high-nickel steels containing about 0.20 percent carbon to determine whether ausforming could develop yield strengths in the range 180 to 210 ksi along with good notch toughness. For comparison, conventionally processed (cross-rolled and quenched and tempered) plates of these steels were evaluated. The ausforming process developed a strength-to-toughness ratio superior to that of the conventionally processed material and about as good as that of any strengthening process investigated to date. However, problems may be encountered in commercially processing and fabricating ausformed plates in thicknesses up to 4 inches. Therefore, additional studies are planned to determine (1) the feasibility of producing ausformed crossrolled plates, and (2) the properties that can be obtained in crossed-rolled plates. (Author)

Descriptors :   (*HOT WORKING, STEEL), (*STEEL, SUBMARINE HULLS), (*SUBMARINE HULLS, NICKEL ALLOYS), AUSTENITE, TABLES(DATA), CHEMICAL ANALYSIS, CHROMIUM ALLOYS, MOLYBDENUM ALLOYS, VANADIUM ALLOYS, ALUMINUM, NITROGEN, TENSILE PROPERTIES, TOUGHNESS, IMPACT SHOCK, HARDNESS, SHEAR STRESSES, PHOTOMICROGRAPHY, MECHANICAL PROPERTIES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE