Accession Number : AD0429143


Title :   SUBSTITUTION OF MANGANESE FOR NICKEL IN NI-CR-MO STEELS.


Descriptive Note : Progress rept.,


Corporate Author : UNITED STATES STEEL CORP MONROEVILLE PA


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


Report Date : 02 Jan 1964


Pagination or Media Count : 22


Abstract : A laboratory study was initiated in which the manganese content of six Ni-Cr-Mo steels was increased from 0.5 to 3.0% and the nickel content was decreased from 4.5 to 0.5% to maintain a calculated hardenability index of 15 to 20. The evaluation consisted of hardenability, mechanical-property, and temperability studies on water-quenched and on blower-cooled 1/2-in.-thick plates of the six vacuum-melted, vacuum-carbondeoxidized Mn-Ni-Cr-Mo steels. The results showed that the hardenability of the highermanganese steels (1.0 to 3.0% Mn) was less than that predicted from the calculations, and the notch toughness of the water-quenched and of the blower-cooled plates decreased continuously as the manganese content increased. (Author)


Descriptors :   *SUBMARINE HULLS , *STEEL , HARDENING , CHROMIUM ALLOYS , MOLYBDENUM ALLOYS , MANGANESE , QUENCHING


Distribution Statement : APPROVED FOR PUBLIC RELEASE