NiFe Alloy 4J29(KOVAR)

Description:

  • NiFe Alloy 4j29 Its usage in the electronics industry for metal parts bonded to hard glass envelopes for such devices as power tubes, x-ray tubes, etc, and other applications requiring glass-to-metal seals.

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Description

NiFe Alloy 4J29(KOVAR)

NiFe Alloy 4J29

 Material grades and equivalents

Trademark

Telcan

UNS

FRANCE

AISI/ASTM

W.Nr

JIS Japan

VAC

Japan

4J29

Nilok

Kovar

DilverP1

ASTM F15

W.Nr 1.981

JIS EMAS-1001

Vacon 12

KV-1

 

Chemical composition:

Alloy

C

P

S

Mn

Si

Ni

Cr

Co

Cu

Fe

N

No

AI

Max

4J29 

0.03

0.02

0.02

0.05

0.3

28.5-29.5

<0.2

16.8-

17.8

<0.2

REST

-

<0.2

-

 

Mechanical Properties in the Annealed Condition:

Yield Strength (0.1% Offset)

Tensile Strength

Elongation

psi

MPa

psi

MPa

(%)

49,000

340

75,000

520

42

 

Characteristic as below:

4J29 is an iron-nickel-cobalt alloy with a coefficient of thermal expansion similar to that of hard (borosilicate) glass. This makes it especially suitable for uses which

require a matched-expansion seal between metal and glass parts.

Processing conditions and application:

Its usage in the electronics industry for metal parts bonded to hard glass envelopes for such devices as power tubes, x-ray tubes, etc, and other applications requiring glass-to-metal seals.