Patent ID: 7754142

Claim:
A homogeneous austenitic iron-base alloy with good corrosion and wear resistance, comprising: a) about 1.8 to about 3.5 wt % carbon; b) about 12 to about 24 wt % chromium; c) about 0.5 to about 4 wt % silicon; d) about 12 to about 25 wt % nickel; e) about 2 to about 16 wt % of tungsten and molybdenum combined; f) about 0.05 to about 4 wt % niobium and vanadium combined; g) about 0 to about 1 wt % titanium; h) about 0.01 to about 0.2 wt % aluminum; i) about 0.05 to about 3 wt % copper; j) less than about 1.5 wt % manganese; and g) at least 40% iron; wherein the alloy has a matrix that is essentially all austenite at room temperature and which is stable; wherein the alloy has a corrosion loss of less than 5 mg when about 12.7 mm of a cylindrical sample of the alloy having a diameter of 6.35 mm and a length of 31.75 mm and heated to about 300° F. (149° C.) is immersed in a 0.25 volume % solution of sulfuric acid at room temperature, withdrawn, heated again, and the cycle repeated for 1 hour, each cycle taking about 24 seconds; and wherein the alloy has a high temperature, pin-on-disc sliding wear resistance, measured using ASTM G99-90 at 500° F. (260° C.), with pin dimensions of 6.35 mm diameter and 25.4 mm length of Eatonite 6 valve facing alloy and a disk of the tested alloy having dimensions of 50.8 mm diameter and 12.5 mm thickness and after simple heat treatment of the disks at 1200° F. (649° C.) for two hours, at 0.13 m/s for 255 m, of less than 450 milligrams.