Are tungsten electrodes classified in the AWS A5.12?

• A. True
• B. False
• C. Not Applicable
• D. Sometimes

Answer: (A)

Tungsten electrodes used in gas tungsten arc welding (GTAW) are classified under AWS A5.12. This standard specifically covers tungsten and tungsten alloy electrodes, outlining their chemical composition limits, mechanical properties, testing requirements, and the classifications used for GTAW applications. Because A5.12 is the official specification for these electrodes, their classification and the related requirements are defined there, including both pure tungsten and alloyed variants. Modern practice often uses cerium- or lanthanum-containing types, but they all fall under the same AWS A5.12 framework.