Which type of torch is preferred for welding thin materials?

The preference for an air or gas-cooled torch with a maximum capacity of less than 200 amps for welding thin materials is grounded in both the efficiency and the heat management required for such applications. Thin materials are more susceptible to heat distortion and burn-through due to their reduced thickness.

Using a torch that's designed for lower amperage helps in maintaining better control over the heat input. This is crucial because too much heat can easily compromise the integrity of thin materials, leading to issues such as warping, detrimental changes in mechanical properties, or unwanted burn-through.

Air or gas cooling systems also provide sufficient cooling for these applications without the weight and complexity associated with water-cooled systems, making it easier to maneuver the torch for precise welding. Overall, the features of an air or gas-cooled torch align well with the needs of welding thin materials, allowing for effective heat management and improved control during the welding process.