In DC welding, the electron flow moves in a single, constant direction. While the question of AC or DC might seem simple, the answer depends heavily on the specific type of steel, the thickness of the material, and the desired outcome of the weld.
AC Cleaning Action for Mill Scale Steel Stock
The Role of AC Current in Steel Fabrication While DC dominates thick steel applications, AC current plays a specific and vital role in the TIG process. A balanced AC wave provides a mix of both properties.
The Case for DC Current on Steel When working with mild steel or low-alloy steel, DC negative (DCEN) is often the preferred choice. Advantages of DCEN for Thicker Materials Deep, efficient penetration suitable for steel over 1/8 inch thick.
Cleaning Mill Scale Steel Stock with AC TIG Welding
Lower heat input on the tungsten electrode, reducing the risk of contamination. Welding reactive alloys that may form an oxide layer.
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