Accession Number : AD0635871

Title :   AN INVESTIGATION OF THE INFLUENCE OF DEOXIDATION AND CHEMICAL COMPOSITION ON NOTCHED-BAR PROPERTIES OF SEMIKILLED SHIP STEEL.

Descriptive Note : Progress rept. no. 2.

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OHIO

Personal Author(s) : Frazier, R. H. ; Boulger,F. W. ; Lorig,C. H.

Report Date : 28 NOV 1952

Pagination or Media Count : 101

Abstract : Formulas for calculating tensile properties and notched-bar transition temperatures were developed from data obtained on a comprehensive series of experimental steels. For a particular strength level, steels with higher manganese-carbon ratios have lower transition temperatures. The influence of nitrogen in raising the strength and transition temperature of semikilled steel was studied. Heats treated with zirconium in amounts ranging from 0.06 to 0.10 per cent were made and tested. Small additions of aluminum to steels with low silicon contents usually lowered the tear-test and Charpy transition temperatures. The presence of titanium in excess of 0.02 per cent seems to increase the transition temperature of both Type A and Type B type ship plate. Increasing the ferritic grain size of a particular steel by austenitizing at increasingly higher temperatures raises the transition temperature.

Descriptors :   (*SHIP PLATES, STEEL), (*STEEL, FRACTURE(MECHANICS)), DEOXIDATION(METALLURGY), SHIP HULLS, TRANSITION TEMPERATURE, TENSILE PROPERTIES, TEMPERATURE, IMPACT TESTS, ROLLING(METALLURGY), TEMPERATURE, CARBON ALLOYS, MANGANESE ALLOYS, SILICON ALLOYS, TITANIUM ALLOYS, ZIRCONIUM ALLOYS, ALUMINUM ALLOYS, NITROGEN, WELDS, GRAIN STRUCTURES(METALLURGY)

Subject Categories : Metallurgy and Metallography
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE