Other Alloys

Dow metal

It is a magnesium-base alloy, containing 90% Mg, 10% Al and a small addition of Mn. Small additions of cadmium and copper increase its thermal conductivity considerably. It offers difficulty in cold working, blanking and drawing, but can be readily cast, forged and rolled. It has good weldability and can be machined. It is used in automobile and aircraft industries.

Beryllium copper

It is an alloy of copper and beryllium. The most popular alloy contains 2% beryllium. It has superior mechanical properties, comparable to steel, can be cold worked and heat treated. It has high corrosion resistance, high heat and electrical conductivity and is nonmagnetic. It can be sand or investment cast to produce castings requiring high strength, high electrical and thermal conductivity and greater stability. It is mainly used for springs, bellows, bordon tubes, diaphragms, and electrical contacts.

Hastelloy

It consists of 57% Ni, 20% molybdenum and 23% iron. It can be readily cold and hot worked and can be welded through usual methods. It has high resistance to acids and salts.

Another composition of hastelloy shows 45% Ni, 22% Cr, 1.5% Co, 0.5% W, 0.15% C, 9% Mo and the rest iron. It possesses high hardness and high yield strength. It is used as a high temperature alloy, such as for components in nuclear plants, aeroengines, rockets, etc.

Vitallium

It is another high temperature alloy with 62% cobalt as the main constituent. Other elements present include 28% Cr, 5.5% Mo, 2.5% Ni, 1.7% Fe and 0.28% C.

Aluminium brass

It is a special alloy containing 76% Cu, 22% Zn and 2% Al which finds its exclusive use in marine applications.