DEVELOPMENT OF A 7 1/2NI-CR-MO STEEL FOR SUBMARINE-HULL APPLICATIONS.
Abstract
Extensive studies on Laboratory and production heats indicate that most of the requirements for an HY-150 steel can be met by a quenched and tempered 7 1/2Ni-Cr-Mo steel. Preliminary welding studies on the 7 1/2Ni-Cr-Mo steel indicated that the notch toughness of the heataffected zone was similar to that of the unaffected base metal, and that the heat-affected zone was susceptible to restraint cracking to about the same degree as that of HY-80 steel. Recently, the Bureau of Ships lowered the yieldstrength objective for the higher strength submarine-hull weldment form a minimum of 150,000 psi to the range 130,000 to 150,000 psi because prospects for the development of a matching filler metal are much better in the reduced yield-strength range. Laboratory studies are now in progress to develop an HY-130/150 weldment. Preliminary results indicate that the required properties can be obtained in a steel with a nickel content significantly lower than 7 1/2%. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 28, 1962
- Accession Number
- AD0459567
Entities
People
- J. V. Alger
- Lew F. Porter
- Robert M. Brown
- S. J. Manganello
- W. J. Murphy
Organizations
- U.S. Steel