Patent ID: 8192682

Claim:
A composition, comprising: from about 18 percent to about 22 percent by weight chromium; from about 5 percent to about 13 percent by weight nickel; between about 1 percent and about 10 percent by weight copper; from 3 percent to about 10 percent by weight manganese; from about 0.5 percent to about 1.5 percent by weight niobium; from about 38 percent to about 63 percent by weight iron; from 0.12 percent to about 0.5 percent by weight nitrogen; from about 0.08 percent to about 0.2 percent by weight carbon, with the balance being iron; and wherein the composition, when at about 800° C., has at least two percent by weight of precipitates comprising phases selected from the group consisting of M(C,N), M 2 (C,N) or M 23 C 6 phases, where M is nickel, copper, niobium, iron or manganese, and wherein the precipitates comprise nanonitrides, the nanonitrides comprising a majority of particles having maximum dimensions in the range of five to one hundred nanometers.