TIG welding, originally intended for thicker materials, can also be used to weld thin metals due to the superior control it provides over energy output. Follow these steps for successful TIG welding thin metals:
- Adjust the Amperage Settings
Begin by adjusting the amperage settings specifically for TIG welding thin metals. Lower the power setting and replace the tungsten electrodes with smaller ones. This reduces the energy output, as less energy is required to melt thin metals. Lowering the heat helps prevent burn-through. Take advantage of the foot pedal control offered by TIG welding to fine-tune the heat as you weld.
2. Select the Proper Filler Metal and Apply it Correctly
TIG welding employs tungsten electrodes to generate the arc. For thin metals, it is recommended to use 0.020 and 0.040 thoriated tungsten electrodes. Thoriated tungsten is alloyed with thorium, which enhances the current distribution of the electrode.
3. Maintain an Even and Rapid Heat Distribution
When TIG welding thin metals, it is important to avoid concentrating the heat in one spot for too long. Utilize the stitch welding technique, which involves a skip technique where a series of welds are applied along the seam. This approach prevents excessive heat accumulation in one area.
Final Thoughts
Welding thin metals can be more challenging than working with thicker materials due to the higher risk of burn-through and damage to the base metal. To overcome this challenge, opt for a welding method that provides precise control, such as MIG or TIG welding. Ensure you have the appropriate tungsten electrodes and shielding gas, and adapt your technique accordingly.
