Patent ID: 8318083

Claim:
A cast austenitic steel alloy consisting of: about 0.4 to about 0.7 wt. % carbon; about 20 to about 35 wt. % chromium; about 30 to 36 wt. % nickel; about 0.5 to 1.1 wt. % manganese; about 0.6 to about 2.0 wt. % silicon; about 0.1 to 0.4 wt. % niobium; up to about 1.5 wt. % tungsten; up to about 1.5 wt. % molybdenum; 0.1 to about 0.4 wt. % titanium, and, the remainder being iron; wherein the alloy does not contain additions of nitrogen; and wherein the total wt. % of carbides in said alloy at about 1200° C. is between about 3.18 and about 7.84.