Alloy 36 (Invar®)

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Alloy 36 (Invar®)

Alloy 36 (Invar®*) is a 36% nickel-iron alloy that exhibits a near zero rate of thermal expansion – approximately one tenth that of carbon steel – at temperatures from around -100°C up to 200°C.

Alloy 36 (Invar®*) offers a high retention of strength and toughness at cryogenic temperatures, making it suitable for a variety of low temperature or low expansion applications. The alloy is ideally suited to areas where dimensional changes due to temperature must be minimal, such as tooling for aerospace composites, radio and electronic devices and structural members in precision equipment such as lasers, measuring devices, thermostats and cryogenic instrumentation.

Related Specifications of Alloy 36 (Invar®*)

  • K93600
  • K93601
  • K93603
  • ASTM B753
  • ASTM F1684
  • SEW 385
  • 1.3912
  • NF A54-301
  • FeNi36

Nominal Composition of Alloy 36 (Invar®*)

Fe 63.0%, Ni 36.0%, Mn 0.6%, Si 0.4%

Mechanical Properties of Alloy 36 (Invar®*)

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
480 310 30 140HV

Key Features of Alloy 36 (Invar®*)

  • Near zero coefficient of linear thermal expansion
  • High strength and toughness at cryogenic temperatures

Applications of Alloy 36 (Invar®*)

General | Positioning devices, bimetal thermostats, advanced composite moulds for aerospace industry, optical devices, echo boxes and filters for mobile telephones, magnetic shielding, small electrical transformers, metrology devices, scientific instruments, electrical circuit breakers, temperature regulators, clock balance wheels, pendulum clocks, precision condenser blades, radar and microwave cavity resonators, special electronic housings, seals, spacers, and specialized frames, high voltage transmission lines

Columbia Metals – a leading supplier of Alloy 36 (Invar®*)

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of Alloy 36 (Invar®*) and other high quality specialist engineering alloys.

To buy or learn more about Alloy 36 (Invar®*) contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
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