Patent ID: 9181597
Filing Date: 2015-11-10
Classification: C21D,C22C

Abstract:
1. A creep resistant alloy having an overall composition comprised of iron and further comprised of from 9.75 to 10.25 wt. % Cr, from 1.0 to 1.5 wt. % Mo, from 0.13 to 0.17 wt. % C, from 0.25 to 0.50 wt. % Mn, from 0.08 to 0.15 wt. % Si, from 0.15 to 0.30 wt. % Ni, from 0.15 to 0.25 wt. % V, from 0.05 to 0.08 wt. % Nb, from 0.015 to 0.035 wt. % N, from 0.25 to 0.75 wt. % W, from 1.35 to 1.65 wt. % Co, from 0.20 to 0.30 wt. % Ta, and from 70 ppm to 110 ppm B, and where the creep resistant alloy has a M 23 C 6 carbide volume percent from 7% to 13%.