Effects of Carbon on Creep-rupture Strength and Toughness of High Cr-Mo Heat Resisting Steels Containing V and Nb

Effects of carbon on creep-rupture properties and room temperature toughness of high (9-10)Cr-(1.8-2)Mo ferritic heat resisting steels containing V and Nb were studied. The carbon content was varied from 0.02 to 0.23% in order to improve toughness without decreasing the creep-rupture strength. Difference existing in creep-rupture strength and in Charpy absorbed energy between 10Cr-2Mo steels and 9Cr-1.8Mo steels were studied with respect to the...