What is the common range of amperage used for thin materials in GTAW?

For thin materials in Gas Tungsten Arc Welding (GTAW), the common range of amperage is typically between 5 to 50 amps. This lower amperage range is crucial for effectively welding thin materials without causing excessive heat or burn-through. Thin materials, which are usually defined as being less than 1/8 inch thick, require careful control of heat input. Utilizing lower amperage helps to ensure a controlled and precise weld pool, resulting in a clean, strong joint.

Higher amperage settings, such as those indicated in the other choices, are more suitable for thicker materials where increased heat is necessary to penetrate and fuse the base metals adequately. Working with high amperage on thin materials can lead to issues like warping, distortion, or burn-through, which can compromise the integrity of the weld and the workpiece itself. Thus, the correct choice reflects the safer and more effective amperage range for thinning materials in GTAW applications.