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Dry sliding wear tests were carried out on steam treated sintered iron alloys in order to evaluate the influence of chemical composition on the durability of the surface oxide layer. Durability was defined as the sliding distance at which wear of surface oxide occurs and was evaluated by means of the friction coefficient evolution. Durability was determined at different loads and a clear influence of the chemical composition of the base material was highlighted. The different behaviour of the studied materials was interpreted on the basis of their microstructural characteristics and the negative effect of copper as an alloying element was shown.