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Kovar Alloy Capillary Tube

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Kovar Alloy Capillary Tube is an iron-nickel-cobalt alloy with a coefficient of thermal expansion similar to that of hard (borosilicate) glass. Heeger Materials can provide the best quality and customized Kovar Alloy Capillary Tube at a competitive price. We can offer W.Nr 1.3912 and FeNi50 brands. The dimensions can be customized.

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Data sheet

MaterialsW.Nr 1.3912, FeNi50
Sizecustomized

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Kovar Alloy Capillary Tube has a chemical composition that can be controlled within narrow limits to assure precise uniform thermal expansion properties. Kovar Alloy has good toughness and plasticity, facilitating deep drawing, stamping, and machining.

Kovar Alloy Capillary Tube

Kovar Alloy Capillary Tube Chemical Composition

Brand No.

Chemical Composition (%)

Ni

Cr

Fe

C

Mn

Si

Cu

Mo

P

S

Co

Al

W.Nr 1.3912

28.5-29.5

≤0.2

Bal.

≤0.03

≤0.5

≤0.3

≤0.2

≤0.2

≤0.02

≤0.02

16.8-17.8

--

FeNi50

49.5-50.5

--

Bal.

≤0.05

≤0.8

≤0.3

--

--

≤0.02

≤0.02

≤1

≤0.1

Kovar Alloy Capillary Tube Physical and Mechanical Properties

Brand No.

Physical Properties

Mechanical Properties

Density

Melting Point

Tensile Strength

Yield Strength (Rp 0.2 N/mm2)

Elongation %

HB

W.Nr 1.3912

8.3 g/cm3

1420-1455 ℃

≥450 Mpa (Annealing)

≥350 Mpa (Annealing)

≥25

≤190

FeNi50

8.21 g/cm3

1425℃

 490 Mpa (Annealing)

--

35

--

Kovar Alloy Capillary Tube Dimension Specifications

Brands No.

Dimension

Kovar Alloy

OD: 0.2-6 mm

WT: 0.02-2 mm

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

Kovar Alloy Capillary Tube Applications

  • Used in electronic components such as vacuum tubes, transistors, and microwave tubes.
  • Used in hermetic seals for electronic and optical devices.
  • Used in aerospace applications due to their ability to withstand high temperatures and maintain dimensional stability.
  • Used in medical devices.

Kovar Alloy Capillary Tube Packing

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

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