Effects of Various Alloying Additions on the Resistance to Oxidation at Elevated Temperatures of 18% Chromium Austenitic Steel

Abstract

Short term, cyclic oxidation tests were carried out on a series of 18% Cr–15% Ni steels with single additions of 34 other elements. The oxidation resistance of 18/15 steels without further alloying, tested to give a basis for comparison, was significantly inferior to that of commercially produced 18/10 types. A11 the alloying additions led to some improvement in oxidation resistance (although in many instances this was to a level no better than that of the commercial steels) despite the facts that the amounts used differed widely (from 0·006% for B to 9·5% for Co), the characteristics of the elements varied and, in some instances, most of the added element was not in solid solution.