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Thoriated electrode versus lanthanated electrode

Thoriated electrode versus lanthanated electrode

Thoriated electrode versus lanthanated electrode

(OP)
Does a change from Thoriated Tungsten Electrode to Lanthanated Tungsten Electrode require requalification of WPS?  

RE: Thoriated electrode versus lanthanated electrode

Per ASME IX QW-256, it is a non-essential variable, so no.

RE: Thoriated electrode versus lanthanated electrode

If ASME IX is the code in question, then Mr168 is correct.  AWS D1.1 has me scratching my head???  I believe they need to separate filler metal and electrode.  I don't think it should be an essential in D1.1 either, but that's just me.

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