Resistant wires, which convert electrical energy to heat energy, are called as “resistance”. The wires on heating elements, which generate heat, called resistance. Resistances have quite high resistivity and thermal endurance (up to 1400 C). They are produced usually by ferroalloys, which contains chrome (cr), aluminium (Al) and nickel (Ni) too, but known as “chrome-nickel wire”. Chrome (Cr), which is included in alloy, increase the resistivity against the heat that is generated by resistance itself. Aluminium (Al), protect the wire against oxidation, which occur after wire became condescent, because of oxyjen in the air. If there is no aluminium in alloy, wire rust (oxidates). Mission of Nickel (Ni) is to resist against chemicals. There are different kind of resistance wires dpending of using application. For example, flat and strip shaped resistance wires are used in irons and toasters, coil shapeds are used in soldering iron and cable types are used in warming pads, pillows and on car glass and sofas etc. And many other different new fields day by day.