NiCr 70 30
UNS N06008
Werkstoff – Nr. 2.4658
DIN 17470 / 17471
Common trade names NiCr 70/30, Resistohm 70, Nikrothal 70, Chromel 70/30, HAI-NiCr 70, Cronix 70, Inalloy 70, X30H70.

NiCr 70 30 (2.4658) is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1250°C. The 70/30 alloy is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent weldability.


Chemical composition

Nickel Ni 60.0% Chromium Cr 29.0-32.0% Iron Fe 5.0% Silicon Si 0.5-2.0% Manganese Mn 1.0% Copper Cu 0.5% Carbon C 0.1%

Physical properties

Density at room°C Electrical resistivity at 20°C Melting point, °C Max continuous operating temperature in air, °C Magnetic properties
8.2 g/cm3 1.16(1.19)* microhm-m 1380 1200 The material is non-magnetic
*Electrical resistivity 1.16 Ω mm2/m corresponds to an Oxidized Annealed condition
  Electrical resistivity 1.19 Ω mm2/m corresponds to a Bright Annealed condition


Mechanical properties

NiCr 80 20
wire, mm
Yield strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Elongation
A %
Hardness Hv
1.0 420 810 30 180
4.0 300 725 30 160


Product forms

Product Size, mm Condition of supply
wire 0.2 – 12.0 bright annealed
oxidized
bar 5.0 – 60.0 hot finished
cold finished
peeled
bright turned
bright annealed
strip Thickness 2.5 – 5.0
Width 20 – 100
cold finished
bright annealed
stranded wire 2.5 – 3.0 hard
annealed


Application

NiCr 70-30 (2.4658) is used for corrosion resistant electric heating elements in industrial furnaces with reducing atmospheres. Nickel Chrome 70/30 is highly resistant to oxidation in air. Not recommend for use in MgO sheathed heating elements, or applications using nitrogen or carburizing atmospheres.
  • electrical parts and electronic components.
  • electric heating elements (home & industrial use).
  • industrial furnaces up to 1250°C.
  • heating cables, mats and cords.

Our customers can buy nichrome wire online according to their requests.

 NiCr 7030 datasheet. Download(286KB)