| http://www.w3.org/ns/prov#value | - Very similar to aluminium!However, when this oxide layer is melted or removed as in welding, any oxygen present is free to attack or combine with the available Chromium and 'coking' or severe oxidisation will be present!Generally, any steel with a Chromium content % of more than 5% will require an inert or other purging gas to reduce/eliminate Oxygen contact with the molten internal root weld pool
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