- Product Details
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Quick Details
-
Elongation (≥ %):
-
30 %
-
Place of Origin:
-
Shanghai, China
-
Application:
-
glass to metal sealing
-
Grade:
-
Nickel Base Alloy
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Ni (Min):
-
28.5
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Model Number:
-
4J29
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Brand Name:
-
OHMALLOY
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Dimensions:
-
OD1-35mm,ID0.3-34mm
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Surface::
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Bright
Quick Details
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Resistance (μΩ.m):
-
/
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Powder Or Not:
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Not Powder
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Ultimate Strength (≥ MPa):
-
570
-
Elongation (≥ %):
-
30 %
-
Place of Origin:
-
Shanghai, China
-
Application:
-
glass to metal sealing
-
Grade:
-
Nickel Base Alloy
-
Ni (Min):
-
28.5
-
Model Number:
-
4J29
-
Brand Name:
-
OHMALLOY
-
Dimensions:
-
OD1-35mm,ID0.3-34mm
-
Surface::
-
Bright
4J29 KOVAR TUBER
Kovar alloy is a vacuum melted, iron-nickel-cobalt alloy that is widely used in the electronics industry. Kovar is a nickel-iron-cobalt, controlled-expansion alloy which contains 29% nickel. Its coefficient of expansion, which decreases with rising temperature to the inflection point, matches the expansion rate of borosilicate glasses and alumina ceramics.
Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials. This alloy has found wide application in power tubes, microwave tubes, transistors, and diodes. In integrated circuits, it has been used for the flat pack and the dual-in-line package.
Chemical Composition
|
Grade |
C% |
P% |
S% |
Mn% |
Si% |
Cu% |
Cr% |
Mo% |
Ni% |
Co% |
Fe% |
|
Kovar |
Max 0.03 |
Max 0.020 |
Max 0.020 |
Max 0.50 |
Max 0.30 |
Max 0.20 |
Max 0.20 |
Max 0.20 |
28.5-29.5 |
16.8-17.8 |
Bal. |
Specifications
|
Grade |
UNS |
Werkstoff Nr. |
|
Kovar |
K94610 |
1.3981 |
Physical Properties
|
Grade |
Density |
Melting Point |
|
Kovar |
8.17 g/cm3 |
1449°C |
Mechanical Properties
|
Grade |
Tensile Strength N/mm² |
||||
|
Soft |
1/4 Hard |
1/2 Hard |
3/4 Hard |
Full Hard |
|
|
Kovar Strip |
<570 |
520-630 |
590-700 |
600-770 |
>700 |
|
Kovar Wire |
<585 |
585-725 |
655-795 |
725-860 |
>860 |
Coefficient of Expansion
|
Alloy |
Linear Coefficient of Thermal Expansion a,10-6/°C |
|||||||
|
20-200°C |
20-300°C |
20-400°C |
20-450°C |
20-500°C |
20-600°C |
20-700°C |
20-800°C |
|
|
Kovar |
5.9 |
5.3 |
5.1 |
5.3 |
6.2 |
7.8 |
9.2 |
10.2 |
Kovar Tubes
1. Q: Where is your factory located? How can I visit there?
A:Our factory is located in Shanghai, China.
All our clients from all over the world , are warmly welcome to visit us! we will pick you up.
2.Q: Where is your raw material comes from?
A: Raw material comes only from suppliers who are top-1 class steel in China.
Good product is originates from the accurate control of the quality of the steel.
3. Q: How can I get some samples?
A: We are honored to offer you samples.
4.Q: How does your factory do regarding quality control?
A. Quality is priority. We always attach great importance to quality controlling from beginning to end.
