FEASIBILITY OF DEVELOPING AN HY-180/210 WELDMENT.
Abstract
Through the development of improved processing practices on small ingots, the notch toughness of air-melted 12Ni-5Cr-3Mo maraging steel appears to be equivalent to that of vacuum-consumable-electrode remelted 12Ni-5Cr-3Mo steel. Thus, light-gage plates of the 12Ni-5Cr-3Mo steel should now meet the desired minimum strength-toughness objective (50 ft-lb at 180 ksi). However, the notch toughness of the 12Ni-5Cr-3Mo steel in plates over 2 inches thick is presently in the range to 40 ft-lb. Therefore, improvements in the chemical composition and melting practice of the 12Ni-5Cr-3Mo steel are being investigated. In addition, the potential of carbon-martensitic age-hardened steels, conventional quenched and tempered steels, and rapidly heat-treated quenched and tempered steel is still being evaluated. The crack susceptibility and toughness of the heat-affected zones of the various experimental HY-180/210 steels are being evaluated concurrently with the development of the base metals. Modest improvements in the notch toughness of the 12Ni-5Cr-3Mo filler metals have been obtained, but HY-180/210 weld metals having energy absorptions consistently over 30 ft-lb have not as yet been developed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1964
- Accession Number
- AD0604869
Entities
People
- A. M. Rathbone
- K. E. Dorschu
- Lew F. Porter
- S. T. Rolfe
Organizations
- U.S. Steel