FEASIBILITY OF DEVELOPING AN HY-180/210 WELDMENT.

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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-180210 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-180210 weld metals having energy absorptions consistently over 30 ft-lb have not as yet been developed. Author

Author(s):
Porter, L. F. ; Rathbone, A. M. ; Rolfe, S. T. ; Dorschu, K. E.
Author Organization(s):
UNITED STATES STEEL CORP MONROEVILLE PA
Descriptive Note:
Quarterly progress rept. no. 4, 1 Apr-30 Jun 64,
Annotation:
Feasibility of developing an HY-180/210 weldment.
Pagination:
0050

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
NObs88540
Task Number(s):
1567
Project Number(s):
SS050 000, 40 018 002 22
 Subject Terms
Joint Capability Areas:
JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*MARAGING STEELS, *SUBMARINE HULLS, STEEL, WELDING, WELDING, NICKEL ALLOYS, CHROMIUM ALLOYS, MOLYBDENUM ALLOYS, VANADIUM ALLOYS, COBALT ALLOYS, METAL PLATES, HEAT TREATMENT, TENSILE PROPERTIES, TOUGHNESS, MELTING, ELECTRODES, THERMAL JOINING, FORGING, MECHANICAL WORKING, STRUCTURAL PROPERTIES, WELDS, FRACTURE(MECHANICS), FATIGUE(MECHANICS), FEASIBILITY STUDIES
Keyword(s):
HY 180 210 WELDMENT, STEEL HY 180 210
Report Date:
1964 Jul 01