지정 | 화학 성분 불순물 ≤0.1% | |||
ISO 6848 | AWS A5.12 | 산화물 첨가제 | 텅스텐 | |
WT20 | EWTh-2 | ThO2: 1.70~2.20% | ≥97.30% | |
WP | EWP | . | ≥99.95% | |
WL15 | EWLa-1.5 | LaO2: 1.30~1.70% ≥ | ≥97.80% | |
WC20 | EWCe-2 | CeO2: 1.80~2.20% | ≥97.30% | |
WL20 | EWLa-2 | La2O3: 1.80~2.20% | ≥97.30% | |
WZ8 | EWZr-8 | ZrO2: 0.70~0.90% | ≥98.60% | |
LaYZr | EWG | La2O3: 1.3~1.7%; ZrO2: 0.06~0.10%; Y2O3: 0.6~1.0% | ≥97.34% |