An yi alloy 20 an yi sanduna da abun ciki na 32.5% na Chromium, Carbon, silicon, Carbon, Silicon, Columum da baƙin ƙarfe. Alliy 20 shine Nickel-Molomium-Molybdenum bakin karfe Duk da haka gaba don aikace-aikacen da suka shafi sulfuric acid. Har ila yau, tsayayya da sauran amfani a cikin sunadarai, abinci, magunguna na masana'antu. Dayoy 20 Resists Conting da chloridede rauni, da tagulla abunuka yana kare shi daga sulfuric acid. Alloy 20 ba ss, amma nickel ado (Astm).