Trace Metals from Manufacturing Processes

Question: Tungsten inert gas (TIG) welding uses tungsten electrodes to join sheets of metal together. For the purposes of responsible mineral reporting, does this mean that tungsten is associated with the final product of a TIG weld?

Answer: No, assuming the final product does not otherwise contain tungsten, TIG welds would not mean a finished product contains tungsten. For the purposes of responsible minerals reporting, a metal is generally considered to be present if testing the final product would reveal its presence at non-trace levels.

If the metal was used in production in a way that leaves only trace amounts in the final product, and that metal doesn’t contribute to the form, fit or function of the final product, then the product does not contain that metal.

Article is current as of 2020-02-07.

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