Which material is typically used for clear nozzles in welding?

Fuzed quartz is commonly used for clear nozzles in welding due to its outstanding properties that are particularly beneficial in high-temperature environments. This material can withstand extreme heat without distorting or melting, making it ideal for applications where a clear view of the welding arc is necessary. Its transparency allows welders to observe the weld pool while maintaining a high level of protection from contaminants.

Additionally, fused quartz has excellent electrical insulation properties, which is crucial in a welding context, as it helps prevent electrical shorts and provides a safer working environment. Its chemical durability ensures that it does not react adversely with the welding gases or the molten metal, thereby preserving the integrity of the welding process.

While other materials like glass and plastic might seem viable for clear nozzles, they typically lack the high-temperature resistance and durability that fused quartz provides. Aluminum, although used in various welding components, does not offer the required clarity and resistance to heat necessary for a nozzle, which needs to remain clear and functional throughout the welding process. Therefore, fused quartz stands out as the most suitable choice for clear nozzles in welding applications.