Alloy is a mixture steel in their composition. Include of alloys for example stainless steel, bronze and brass. A wide range of metal properties can be controlled by alloying, such as mechanical strength, corrosion-resistance, and electrical characteristics. An example of the change achievable in mechanical properties by alloying is the AMALGAM used for dental work. Alloys were first used to improve the mechanical strengths of metals, for example bronze and brass. The tensile strength of iron can be nearly quadrupled by adding only a small amount of carbon.
For aircraft and aerospace applications, titanium alloys have been developed with tensile strengths up to 1400 x 108 N/m2, with density only 60 % of steel. The development of jet engines, with their high internal temperatures, was made possible by the availability of super-alloys based on nickel and cobalt, which are use for turbine blades.
Alloys with low melting temperatures can be made by using lead, cadmium, bismuth, and other low melting temperature metals. Various metal and ceramic alloys are also use as superconductor.
See article of anodized aluminum
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