EFFECT OF CHROMIUM CONTENT ON THE WELD-HEAT-AFFECTED-ZONE TOUGHNESS AND TRANSFORMATION CHARACTERISTICS OF 5NI-CR-MO-V STEELS.
UNITED STATES STEEL CORP MONROEVILLE PA
Pagination or Media Count:
The effect of variations in composition on the base-metal properties of ten 5Ni-Cr-Mo steels was investigated, and three of the ten steels, containing 0.5, 1.0 and 1.5 chromium, were evaluated to determine the effect of chromium on the toughness, transformation characteristics, and crack susceptibility of their simulated weld-heat-affected zones. The results showed that over the full range of practical welding conditions, the energy absorption of the various regions in the simulated weld-heat-affected zones of the three steels was high and ranged from 60 to 125 ft-lb at 80 F. In addition, the formation of fully martensitic microstructures in the simulated weld-heat-affected zones indicated that the three steels had sufficient hardenability for all practical welding conditions. Author