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Rivets used in most of the application are made of steel. There are two varieties of steel rivet bars-hot rolled steel rivet bar and high-tensile steel rivet bar. There chemical compostion is as follows: Carbon = 0.23%(max) Sulphur = .05%(max) Phosphorus = 0.05%(max) Riverts used in corrosive atmosphere are made of stainless steel. Riverts used for connecting non-ferrous metals and soft materials are made of copper, brass, bronze and aluminium alloys. Structure joints made of aluminium alloys section emplyos duralumin rivets. When metal for the parts being joint and rivert metal have different electrochemical potentials they form galvanic pairs and accelerate the corrosion process. Therefore, many times riverts times riverts are made of the same material as the parts being joints.