- Product Details
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Quick Details
-
Model Number:
-
Kovar
-
Shape:
-
Sheet
-
Material:
-
Ni-Co-Fe Alloy
-
Chemical Composition:
-
29% nickel, 17% cobalt, iron balance
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Model No.:
-
Ni29Co18 Kovar Nickel Iron alloy weld tube
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specification:
-
KOVAR/4J29/ASTM F15/UNS K94610
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standard:
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ASTM/AISI/ASME/GB/DIN etc
-
certificate:
-
ISO9001/ROHS/BV
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chemical compostion:
-
nickel chrome iron alloy
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surface treatment:
-
smooth and bright
-
application:
-
making hermetic seals with the harder pyrex glass
-
Property:
-
Ni29Co18 Kovar Nickel Iron alloy weld tube
Quick Details
-
Application:
-
transistors, diodes, hybrid packages
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Place of Origin:
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Jiangsu, China
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Brand Name:
-
Fenghua
-
Model Number:
-
Kovar
-
Shape:
-
Sheet
-
Material:
-
Ni-Co-Fe Alloy
-
Chemical Composition:
-
29% nickel, 17% cobalt, iron balance
-
Model No.:
-
Ni29Co18 Kovar Nickel Iron alloy weld tube
-
specification:
-
KOVAR/4J29/ASTM F15/UNS K94610
-
standard:
-
ASTM/AISI/ASME/GB/DIN etc
-
certificate:
-
ISO9001/ROHS/BV
-
chemical compostion:
-
nickel chrome iron alloy
-
surface treatment:
-
smooth and bright
-
application:
-
making hermetic seals with the harder pyrex glass
-
Property:
-
Ni29Co18 Kovar Nickel Iron alloy weld tube
Ni29Co18 Kovar Nickel Iron alloy weld tube
The expansion characteristics of Kovar match both borosilicate (or Pyrex) glasses and alumina ceramics, making it one of the most popular of the controlled expansion alloys for hermetic sealing applications.
Kovar alloy is a iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
Ni29Co18 Kovar Specification
|
ASTM |
UNS |
W.Nr |
|
F15 |
K94610 |
1.3981 |
Ni29Co18 Kovar Chemical composition
|
Grade |
% |
Ni |
Cr |
Fe |
Co |
Cu |
C |
Mn |
Si |
P |
S |
Mo |
|
Kovar |
Min |
28.5 |
|
Bal. |
16.8 |
|
|
|
|
|
|
|
|
Max |
29.5 |
0.2 |
17.8 |
0.20 |
0.03 |
0.50 |
0.30 |
0.02 |
0.02 |
0.20 |
Ni29Co18 Kovar Coefficient of linear expansion
|
Grade |
a/10-6·K-1 |
||
|
Kovar |
200-300°C |
20-400°C |
20-450°C |
|
/ |
4.6-5.2 |
5.1-5.5 |
|
