Effect of Vanadium on the 475° C Embrittlement of a Chromium Steel

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Abstract
Ferritic stainless steels containing more than 13% chromium are subject to severe embrittlement, known as the 475° C embrittlement, when heated in the temperature range of 400–550° C. Several experimental and review papers have been published about this phenomenon concerning binary iron–chromium alloys. On the other hand, the occurrence of the 475° C embrittlement in the presence of other alloying elements is not thoroughly studied. According to the results of Baerlecken and Fabritius, strong carbide formers (titanium and niobium) slightly increase the embrittlement. The effect of high vanadium contents was studied by Mima et al. They found that vanadium decreases rather than increases the embrittlement. This note refers the effect of small vanadium contents on the 475° C embrittlement of a 17% Cr steel.

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