Classification Of Alloy 20 Pipes: In harsh chemical and acidic environments, alloy 20 is a highly corrosion-resistant material that is frequently used. One kind of piping system made from this substance is alloy 20 pipes. The excellent resistance of alloy 20 pipes to a variety of acids, such as sulfuric acid, phosphoric acid, and nitric acid, as well as to chloride stress-corrosion cracking, is...