Improvements in and relating to the manufacture of electrical heating wires
Electric heating wires having high resistance and high temperature coefficient of resistance are made from steels containing about 1,8-5 per cent of chromium and about 7,5-12 per cent of aluminium, with or without up to a total of 2 per cent of other elements such as silicon, titanium, beryllium, manganese, nickel, cobalt, tungsten, and molybdenum.