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Electrical Resistance / Heating Element Alloys IconNickel-Chromium: Heating Element and Resistance Alloys

Alloy Description

NiCr 80:20 - Industrial furnaces (up to 1200°C), electric cooking equipment, precision resistors.

NiCr 70:30 - Industrial furnaces (up to 1230°C) with alternating oxidizing/reducing atm., precision resistors.

NiCr 60:15 - Industrial furnaces (up to 1100°C), electrically heated equipment, high-resistance and potentiometer resistors.

NiCr 40:20 - Domestic heating appliances (up to 1050°C), furnaces in carburising or semi-reducing atmosphere.

NiCr 30:20 - Industrial furnaces (up to 1050°C), heating elements of cooking equipment.

Condition of Supply

NiCr alloys are available in following conditions:

  1. Bright Annealed
  2. Oxidized Annealed
  3. Bright Drawn

Properties

 Specific Resistance
(Electrical Resistivity)
µOhm-cm
Density g/cm³Linear Expansion Coeff.
bet RT & 1000°C (10-6/K)
Maximum Operating Temperature
(°C) (in air)
NiCr 80:201088.317.01200
NiCr 70:301188.117.01250
NiCr 60:151128.217.01100
NiCr 40:201057.919.01050
NiCr 30:201047.919.01000

For Resistance (in Ohm/m) of any size, devide the above resistivity with (cross-sectional area in mm² of that size x 100).

R (ohm/m) = Resistivity (michrohm-cm) / A (in mm²) x 100

Size Range

 WireStripRibbon
Dia (mm)12 - 0.15--
Width (mm)-5 - 1000.5 - 5
Thickness (mm)-0.5 - 30.15 & Above

Mechanical Properties at Room Temperature

 NiCr 80:20NiCr 70:30NiCr 60:15NiCr 40:20NiCr 30:20
Tensile strength
Min-Max (N/mm²)
700-900800-950700-850700-850650-800
Elongation %
(L0=100 mm)
25-3525-3025-3525-3525-35

Note: Other Grades of Nickel-Chromium resistance alloys are also available. Please contact us for more information.

 

 

electrical resistance alloys and heating element alloys that have nickel chromium alloys and nickel chromium iron alloys as in NiCr 80:20, NiCr 70:30, NiCr 60:15, NiCr 50:18, NiCr 30:20, NiCr 20:25.

Then there are iron chrome aluminium alloys as in FeCrAl 145, FeCrAl 135, FeCrAl 125 (FeCrAl alloys numbers indicate the resistivity in Microhm-cm at 20°C).

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