Which metals are commonly welded using TIG welding?

TIG (Tungsten Inert Gas) welding, also known as GTAW (Gas Tungsten Arc Welding), is highly versatile and is particularly well-suited for welding thin materials. Mild steels are frequently welded using this method due to its ability to produce precise and clean welds, making it ideal for applications that require detailed work. Mild steel's relatively low carbon content provides good weldability and forms a strong joint.

Cast iron, while it can be more challenging to weld due to its brittleness and tendency to crack, can also be welded with TIG with the right techniques and preparation. The TIG welding process allows for excellent control over the heat input, which is critical when working with cast iron to avoid distorting or compromising the material properties.

The other options present metals that are either less commonly associated with TIG welding or require different welding processes to achieve optimal results. High-strength alloys often require specialized techniques or processes, carbon steel can also be welded with other methods that are more commonly used in heavier applications, and zinc is often not welded but rather joined through other methods due to its low melting point and propensity for creating weld defects.