The chemical composition of Monel K500 Nippo Flanges provides great resistance to a lot of corrosive environments, such as pitting, crevice corrosion, inter ¨C granular corrosion, and stress ¨C corrosion cracking. Monel K500 Spacer Flanges has useful resistance to boiling sulfuric acid up to 40 % concentration, to 60 % concentration at 176 Degree F and in all concentrations to 150 Degree F.