Tungsten types, shielding gas, filler metals, aluminum techniques and torch control.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What color code identifies pure tungsten electrodes?
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Green- What color code identifies 2% thoriated tungsten electrodes?
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Red- What is the main advantage of thoriated tungsten over pure tungsten?
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Better arc starting and longer electrode life- What color code identifies lanthanated tungsten electrodes?
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Black- Why is lanthanated tungsten preferred over thoriated in some applications?
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It is non-radioactive and provides excellent arc starting- What color code identifies ceriated tungsten electrodes?
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Orange- Which tungsten type is best for AC welding of aluminum?
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Pure tungsten or thoriated tungsten- What is the most widely used shielding gas in GTAW welding?
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Argon- Why is helium sometimes added to argon in shielding gas mixtures?
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To increase heat and improve penetration- What is a typical argon-helium mixture ratio for aluminum GTAW?
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75% helium and 25% argon, or other high-helium blends- When might carbon dioxide be added to argon in GTAW shielding gas?
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When welding carbon steel to increase penetration- What shielding gas is recommended for stainless steel GTAW welding?
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Pure argon or argon with small amounts of CO2 or oxygen- What AWS filler rod designation is used for mild steel GTAW?
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ER70S-2 or ER70S-3- What does the ER prefix in welding rod designation indicate?
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Electrode rod, used in GTAW without flux- What does the 70 in ER70S indicate?
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70,000 PSI minimum tensile strength
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