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TC 30 - Temperature Compensating Nickel-Iron Soft Magnetic Alloy

Alloy Description

This is a Nickel-Iron alloy that is used for applications where magnetic shunts are used for temperature compensation. Most frequently it is used for temperature compensation in energy meters, speedometers and temperature regulation devices.

Condition of Supply

TC 30 is supplied in the following conditions:

  • Cold Drawn.
  • Cold Drawn, Annealed.

Nominal Composition:

Nickel Chromium Iron
30% - 8%

Specifications

British Standard Werkstoff Nr UNS Designation ASTM
BS 3075 (NA14) 2.4816 N 06600 B 166

Size Range

Wires: 10.0 mm diameter to 0.15 mm diameter. (0.3937" diameter to 0.0059" diameter).

Strips: Width 0.4-100 mm, Thickness: 0.10 mm and above.

Typical Physical Properties

  Youngs Modulus (E) Rigidity Modulus (G) Density Electrical Conductivity
Metric 206.0 kN/mm2 75.6 kN/mm2 8.47 g/cm2 1.5 % IACS
Imperial 29.88 x 104 psi 10.96 x 104 psi 0.306 lbs/in3  

Typical Tensile Properties

  Solution Annealed Spring Temper & Aged
Metric 683 N/mm2 850-1200 N/mm2
Imperial 100 Ksi 123-174 Ksi

Recommended Service Temperatures

Minimum: -200ºC (-328ºF) but below -120ºC (-184ºF) slight magnetism may occur.

Maximum: 340ºC (644ºF) For continuous operation. Can be taken up to 1000 °C.

Heat Treatment

For better mechanical handling, stress relieve at 450-480 °C for 60 minutes is recommended.

 

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Nickel-Iron alloys that are used as Soft Magnetic Alloys and Compensating Alloys: TC 30 (Ni30 Fe), TC 31 (Ni31 Fe), TC 32 (Ni32 Fe)

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High Permeability Alloys: SMA 45 (Ni45 Fe), SMA 48 (Ni48 Fe), SMA 36 (Ni36 Fe).

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