Heating Element Alloys

Specialty Nickel Chromium Heating Alloys


NiCr 37:18

Alloy Description

NiCr 37:18 is a nickel-chromium-iron alloy with excellent resistance to carbonization. It is widely used in conveyor belts for industrial furnaces.

Condition of Supply

NiCr 37:18  is supplied in the following conditions:

  • Cold Drawn, Spring Temper.
  • Cold Drawn, Annealed.

Nominal Composition

Nickel %Chromium %Iron %
3718Balance

Specifications

British StandardWerkstoff NrUNS Designation
-1.4864-

Size Range

10.0 mm diameter to 0.122mm diameter.
(0.3937” diameter to 0.0048” diameter)

Typical Physical Properties

Temp. Coeff. Of
Resistance Km x 10-6/°C
Specific Resistance
microhm-cm (20°C)
Density
gm/cm3
Linear Expansion
Coeff. X 10-6 /°C
360 (20-500 °C)1057.9519 (20-1000°C)

Typical Tensile Strength

 Annealed
Metric 650-750 N/mm2

NiCr 60:15

Alloy Description

NiCr 60:15 is a nickel-chromium-iron resistance alloy with heat resisting strength at high temperatures. This alloy is used in numerous domestic appliances and industrial resistors.

Condition of Supply

NiCr 60:15  is supplied in the following conditions:

  • Cold Drawn
  • Cold Drawn, Annealed.

Nominal Composition

Nickel %Chromium %Iron %CarbonManganese
6015Balance0.08 max1 max

Specifications

British StandardWerkstoff NrASTMUNS Designation
-2.4667B 344N06004

Size Range

  • Wires: 10.0 mm diameter to 0.122mm diameter
  • Strips: width:  8 mm-80 mm, thickness: 2.5 mm-0.1 mm
  • Ribbons: width: 1 mm-6mm, thickness: 1 mm-0.1 mm

Typical Physical Properties

Temp. Coeff. Of
Resistance Km x 10-6/°C
Specific Resistance
microhm-cm (20°C)
Density
gm/cm3
Linear Expansion
Coeff. X 10-6 /°C
170 (20-500 °C)1128.217 (20-1000°C)

Typical Tensile Strength and elongation

 Annealed
UTS 600-900 N/mm2
Elongation>20

NiCr 80:20

Alloy Description

NiCr 80:20 is a nickel-chromium alloy that gives remarkable performance till 1200 °C. It is highly recommended for resistance heating elements operating at high temperatures or running under cyclic heating and cooling conditions. It is widely used in industrial furnaces, industrial and domestic applications, wire wound resistors and potentiometers.

Condition of Supply

NiCr 80:20  is supplied in the following conditions:

  • Cold Drawn
  • Cold Drawn, Bright Annealed
  • Cold Drawn, Oxidized Annealed (Green)

Nominal Composition

Nickel %Chromium %Iron %Silicon %Manganese
Bal201 max1-1.501 max

Specifications

DIN StandardWerkstoff NrASTMUNS Designation
17470 / 174712.4869B 344N06003

Size Range

  • Wires: 10.0 mm diameter to 0.050 mm diameter
  • Strips: width:  8 mm-80 mm, thickness: 3.2 mm-0.20 mm
  • Ribbons: width: 1 mm-6mm, thickness: 1 mm-0.1 mm

Typical Physical Properties

Temp. Coeff. Of
Resistance Km x 10-6/°C
Specific Resistance
microhm-cm (20°C)
Density
gm/cm3
Linear Expansion
Coeff. X 10-6 /°C
60  (20-1000 °C)112 (DIN 17470)
108 (ASTM B 344)
8.3017.0 (20-1000°C)

Typical Tensile Strength and elongation

 Annealed
UTS 630-900 N/mm2
Elongation15-30% (depends upon size)

Note: Other Grades of heating element and resistance alloys (including NiCr alloys) are also available. Please contact us for more information.

Article coutsey of JLC Electromet Pvt. Ltd., India

The alloys NiChrome, Kanthal, Incoloy and other nickel alloys in wire strip and bar form are widely used in manufacturing the household appliances and heating elements below the working temperature of 1000'C.

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