GTAW Nomenclature
EWP Pure Tungsten
EWLa-1.5 1.5% Lanthanum EWTh-1 1% thorium
EWLa-2 2% Lanthanum EWLa-2 1% Lanthanum
EWCe-2 2% cerium
EWG 1.5% Lanthanum .08% Zirconium, .08% Yttrium EWTh emits alpha radiation
EWLa-2 2% Thorium
EWG General no specific composition
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