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Kovar 4J29

Kovar 4J29
Product Details

Kovar alloy 4J29


Chemical Composition Wt.%

No.

Chemical composition (mass fraction) (%)


4J29

C

Mn

Si

P

S

Cu

Cr

Mo

Ni

Co

Fe

≤0.03

≤0.50

≤0.30

≤0.020

≤0.020

≤0.20

≤0.20

≤0.20

28.5~
29.5

16.8~
17.8

bal


Brief Introduction

4J29 alloy, also known as Kovar alloy. The alloy has similar linear expansion coefficient to silicon-boron-hard glass at 20-450 ℃, high Curie point and good low-temperature tissue stability. Alloy oxide film is dense, can be well infiltrated by the glass. And does not interact with mercury, suitable for use in mercury-containing discharge meters. Electric vacuum device is the main structure of the sealing material.

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