INVESTIGATION OF THE CREEP-RUPTURE PROPERTIES OF M0-V LOW-ALLOY STEELS

摘要

Creep-rupture properties were determined for low-alloy steels containing higher vanadium and less molybdenum contents than several of the standard types now in use. The steels were tested at 900° and 1000°F in the normalized and normalized-and-tempered conditions using austenitizing temperatures of 1800°, 1950°, and 2000°F.n It was necessary to normalize from a high temperature, 1950°F, to realize an improvement in strength from the higher vanadium additions. The high-vanadium steels (0.5% to 0.7%) were superior to the low-vanadium type (0.2%) at 1100°F in both strength and ductility. A reduction in molybdenum content was effected without lowering strength at 1100°F.