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Invar 36 Capillary Tube

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Invar 36 Capillary Tube is a nickel-iron alloy, with a very low coefficient of thermal expansion, and can maintain a fixed length in a wide temperature range. Heeger Materials can provide the best quality and customized Invar 36 Capillary Tube at a competitive price. The dimensions can be tailored according to specific requirements.

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Data sheet

MaterialsInvar 36, Nilo Alloy 36
Sizecustomized

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Invar 36 Capillary Tube is available in numerous thicknesses and dimensions for applications requiring high dimensional stability and low thermal expansion. Invar 36, also called Nilo Alloy 36, UNS K93600. The control of the carbon and manganese composition is very important. In dry air at room temperature, it is corrosion-resistant. In other harsh environments, such as humid air, corrosion (rust) may occur.

Invar 36 Capillary Tube

Invar 36 Capillary Tube Chemical Composition

Brand No.

Chemical Composition (%)

Ni

Fe

C

Mn

Si

P

S

Invar 36

35-37

Bal.

≤0.05

0.2-0.6

≤0.3

≤0.02

≤0.02

Invar 36 Capillary Tube Typical Physical Properties

Density (g/cm3)

8.1

Electrical resistivity at 20℃ (Ωmm2/m)

0.78

Temperature factor of resistivity (20℃~200℃)X10-6/℃

3.7~3.9

Thermal conductivity, λ/ W/(m·℃)

11

Curie point Tc/ ℃

230

Elastic Modulus, E/Gpa

144

Invar 36 Capillary Tube Typical Mechanical Properties

Tensile Strength (Mpa)

Elongation (%)

641

14

689

9

731

8

Invar 36 Capillary Tube Coefficient of Expansion

θ/℃

α1/10-6℃-1

θ/℃

α1/10-6℃-1

20~-60

1.8

20~250

3.6

20~-40

1.8

20~300

5.2

20~-20

1.6

20~350

6.5

20~0

1.6

20~400

7.8

20~50

1.1

20~450

8.9

20~100

1.4

20~500

9.7

20~150

1.9

20~550

10.4

20~200

2.5

20~600

11.0

Invar 36 Capillary Tube Dimension Specifications

Brands No.

Dimension

Invar 36

OD: 0.2-6 mm

WT: 0.02-2 mm

Note: The dimensions can be tailored according to specific requirements.

Invar 36 Capillary Tube Applications

  • Used in precision instruments such as scientific instruments, optical devices, and measuring tools.
  • Used in aerospace and defense applications.
  • Used in electronic and telecommunication devices where thermal stability is crucial.
  • Used in cryogenic applications due to their low thermal expansion coefficient.
  • Used in medical and scientific research applications.

Invar 36 Capillary Tube Packing

Invar 36 Capillary Tube will be packaged in wooden cases supported by soft materials to prevent movement during transportation and storage.

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