1) high specific resistivity : The resistivity of material should be high so that a small length of wire may be sufficient to produce the required amount of heat.
2) Low temperature coefficient of resistance: Variation of resistance value with temperature Should be as small as possible. so that resistance should be constant.
(3) high melting point : Melting point should be higher than operating temperature so that charge can be heated to a high temperature
(4) )High oxidizing temperature : The oxidizing temperature of the element used as electric heating element should be higher.
5)Ductility : For desired shape and size, the material should be ductile.
6) Mechanical strength : It should be able to withstand external vibration. Le it should be mechanically strong.
(7) Anti-corrosive: It should not be affected due to chemical fumes.
8)Size: The size should be as small as possible.
9) Cost: Cost should be minimum.
