Resistance Wire

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Alloy Specifications


  • Withstands temperatures up to 1100°C
  • Uses: Typical applications include night-storage heaters, convection heaters, heavy-duty rheostats and fan heaters. It is also used in heating cables and rope heaters in defrosting and de-icing elements, electric blankets and pads, car seats, baseboard heaters, floor heaters, resistors, etc. This Nickel-Chrome-Iron alloy has been widely used for furnace elements in the critical temperature range between 816 and 982C in atmospheres where preferential oxidation of chromium takes place the Green Rot range. N4 is also widely used as electric heating element material in domestic appliances and other electric heating equipment at operating temperatures up to 1100C. It has good ductility after use, good corrosion resistance except in sulfur containing atmospheres and certain controlled atmospheres and excellent weldability.
  • Common Name: Chromel D, Nikrothal 40, N4, Chromax, HAI-NiCr 40, Tophet D, Resistohm 40, Cronifer III, 35-20 Ni-Cr, Alloy D, Nikrothal 4, MWS-610, Stablohm 610


Nickel (Ni) 35%
Chromium (Cr) 20%
Iron (Fe) Balance
Aluminium (Al) None/Trace
Silicon (Si) None/Trace
Manganese (Mn) None/Trace
Copper (Cu) None/Trace
Carbon (C) None/Trace
Titanium (Ti) None/Trace
Molybdenum (Mo) None/Trace
Tungsten (W) None/Trace


  • Specific Resistance:  610 ohms/cmf, 101.41 microohm/cm
  • Nom. Temp. Coeff. of Resistance (TCR):  0.0004 ohm/ohm/°C (0-100°C)
  • Density:  0.287 lb/cu. in.
  • Specific Heat (20°C):  0.11 cal/g
  • Nominal Coefficient of Linear Expansion:  15.6 X 10-6 in/in/°C
  • Approx. Melting Point:  1390°C
  • Tensile Strength at 20°C:  175 KPSI Hard, 90 KPSI Annealed
  • Magnetic Attraction:  Faint