Gas Nitriding process provides several advantages for the alloys treated, such as high surface hardness, wear resistance, anti-galling, good fatigue life, corrosion resistance and improved sag resistance at temperatures up to the nitriding temperatures. Gas nitriding is typically done using ammonia with or without dilution of the atmosphere with dissociated ammonia or nitrogen (or nitrogen/hydrogen) in the temperature range of 925-1050°F (500-565°C). Ammonia (NH3) is allowed to flow over the parts to be hardened.Due to the temperature and the catalytic effect of the steel surface, the ammonia dissociates into atomic nitrogen and hydrogen in accordance with equation 2NH3 → 2N + 6H.