Monel metal is a copper and nickel alloy containing 65-70 percent nickel, 20-29 percent of copper and small amounts of iron, manganese, silicon and
carbon. It was discovered by Robert Crooks Stanley, who
worked for the International Nickel Company (INCO) in 1905. It is stronger than steel, malleable, resistant to corrosion, has low coefficient of thermal expansion, highly resistant to alkalis. It can be easily brazed, welded and soldered. It is used in sheet and plate ductwork, flashing, gutters and downspouts, mail chutes, laundry chutes, elevator fittings, lighting fixtures, and skylights.