What type of metal typically requires full joint shielding gas protection when GTAW welding chromium?

The requirement for full joint shielding gas protection when GTAW (Gas Tungsten Arc Welding) welding chromium typically pertains to stainless steel. Stainless steel contains significant amounts of chromium, which provides corrosion resistance due to the formation of a protective oxide layer.

When welding stainless steel, it is crucial to maintain a clean and controlled environment to prevent contamination. Full joint shielding gas protection is essential to prevent oxidation and ensure the mechanical properties and integrity of the weld are retained. Argon is commonly used as the shielding gas in GTAW for stainless steel to provide the necessary protection against the atmospheric elements during the welding process.

Welding other metals such as cast iron, low carbon steel, or bronze may not demand the same level of shielding due to their different properties and the effects that atmospheric exposure has on them during welding. Thus, the need for stringent shielding practices is heightened when working with stainless steel and its chromium content.