Patent ID: 6896747

Claim:
Austenitic alloy for high-temperature strength with improved pourability and manufacturing, comprising, by weight-%: 0.010%<carbon<0.04% 0%<nitrogen<0.01% silicon<2% 16%<nickel<19.9% manganese<8% 18.1%<chromium<21% 1.8%<titanium<3% molybdenum<3% copper<3% aluminum<1.5% boron<0.01% vanadium<2% sulfur<0.2% phosphorous<0.04% and up to 0.5% of at least one element selected from the group consisting of yttrium, cerium, lanthanum and other rare earths, the remainder being iron, wherein the alloy satisfies the two following relationships: in relationship to the solidification mode: remainder a =eq. Ni a −0.5×eq. Cr a <3.60 where eq. Cr a =Cr+0.7×Si+0.2×Mn+1.37×Mo+3×Ti+6×Al+4×V, and where eq. Ni a =Ni+22×C+0.5×Cu, in relationship to the rate of residual ferrite: remainder b =eq. Ni b −2×eq. Cr b >−41 where eq. Cr b =Cr+0.7×Si+1.37×Mo+3×Ti+6×Al+4×V, and where eq. Ni b =Ni+22×C+0.5×Cu+0.5×Mn.