Metals and passivatable alloys - Selection rules and standard uses

Wherever possible, alloy designations are expressed in the terms of French standards. However, at the time of the very first version of this article in 1994, under the reference [M 153] , certain trade marks of the major historic French producers had also passed into common parlance, but by the following version in 2008 (now [COR 310] ), and with the globalization of the market, usage had often led them to prefer the number of the American standard, but omitting "AISI", which means that this is a simple designation, and not a strict reference to this standard.

However, for certain grades, their history or the state of standardization have sometimes led to a preference for the German standard number. When it comes to vocabulary, it's usage that makes the language, so just remember that, for stainless steels, three digits refer to AISI and four digits to Werkstoff Nummer. And in any case, you can find all the technical information you need on the Internet , even if the durability of addresses is never guaranteed.

Finally, unless otherwise stated, percentages are always expressed in mass.

In addition, the main means of combating corrosion were described in the article Corrosion of metals and alloys in aqueous media [M 150] , including passivity.

This article is therefore devoted to the use of metals and alloys whose range of passivity is sufficiently wide in a whole range of environments, and where they can therefore be used without any additional protection. Its aim is thus to provide a guideline for overcoming the fundamental...