The part with the guardian metal metallurgically impacted with the weld or thermal slicing warmth, although not melted. Some processes make use of a flux, which melts while in the arc to generate a slag covering which, subsequently, envelops the weld pool and guards it all through freezing. BS EN https://mylesyupke.activablog.com/5319256/not-known-factual-statements-about-iso3834