Bimetal strip having a stable fe-mn-ni alloy with high thermal expansion and electrical resistivity

Abstract From the Canadian patent

Bimetal strip the high expansion element of which is an alloy which, in weight percent (w/o) consists essen-, tially of up to about 0.50 w/o carbon about 15-50 w/o man-, ganese, up to about 2 w/o silicon up to about 0.5 w/o chro-, mium, about 10-35 w/o nickel up to about 10 w/o cobalt and, the balance iron except for incidental amounts of other elements which may include up to about 0.04 w/o phosphorus up to about 0.04 w/o sulfur as well as other elements which do not significantly detract from the desired properties or result in the formation of ferrite or otherwise render the desired room temperature austenitic structure of the alloy unstable so as to significantly reduce the coefficient …