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| Applicable Industries | Manufacturing Plant, Machinery Repair Shops, Energy & Mining | Place of Origin | Shanghai, China |
| Brand Name | Fine-Boon | Model Number | Tailor-made |
| Type | sleeve | Material | Kovar Alloy |
Advanced Precision Machined Kovar Sleeve
for Feedthrough Brazing
Kovar alloy is a glass and ceramic sealing metal
alloy, it has been used for hermetic seals with
the harder Pyrex glasses and alumina ceramic
material.The expansion characteristics of Kovar
match both glasses and alumina ceramics, making
it one of the most popular controlled expansion
alloys for hermetic sealing applications. Kovar
is produced to ensure good properties for
stamping ,machining and deep drawing, and is a
porosity free product.
We can make various tailor-made kovar alloy components with high precision with CNC machining centers, they are suitable for brazing with glass or alumina due to similar C.T.E and excellent hermetic sealing result for vacuum fields.We fully understand the quality importance for your brazing result and each part are 100% inspected for dimensions and leaking tests before shipping.
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China Name
|
USA Name
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Germany Name
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|||
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Standard
|
YB/T5231
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ASTM
|
UNS
|
W-Nr DIN 17745
|
|
|
Kovar
|
4J29
|
F15
|
K94610
|
1.3981
|
|
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Product Name
|
Advanced Precision
Machined Kovar Sleeve for Feedthrough
Brazing
|
|
Material
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Kovar Alloy - 29% Ni, 17% Co and the balance is Fe
|
|
Color
|
Nickel white
|
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Standard
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DIN, GB, ISO, JIS, BA, ANSI, ANS,
|
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Grade
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Annealed, 1/4 hard, half hard, 3/4 hard, hard
|
|
Brade
|
Rock
|
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Thread
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coarse, fine
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Used
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Power tubes, Microwave tubes, Transistors, Diodes,
Hybrid packages, and scientific instruments
|
|
Kovar Alloy Chemical Compositions Sheet -
made by Shanghai Fine-Boon
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||||||||
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Elements
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Symbol
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YB/T 5231
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ASTM F15
|
DIN 17745
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||||
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4J29
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K94610
|
1.3981
|
||||||
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Carbon
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C
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≤0.03
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≤0.04
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≤0.05
|
||||
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Silicon
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Si
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≤0.30
|
≤0.20
|
≤ 0.30
|
||||
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Manganese
|
Mn
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≤0.50
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≤0.50
|
≤0.50
|
||||
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Phosphorus
|
P
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≤0.020
|
-
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-
|
||||
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Sulphur
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S
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≤0.020
|
-
|
-
|
||||
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Nickel
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Ni
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28.5~29.5
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29.0*
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28.0~30.0
|
||||
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Cobalt
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Co
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16.8~17.8
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17.0*
|
16.0~18.0
|
||||
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Chromium
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Cr
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≤0.20
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≤0.20
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-
|
||||
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Copper
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Cu
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≤0.20
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≤0.20
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-
|
||||
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Molybdenum
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Mo
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≤0.20
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≤0.20
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-
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Aluminum
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Al
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-
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≤0.10
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-
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Magnesium
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Mg
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-
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≤0.10
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-
|
||||
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Zirconium
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Zr
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-
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≤0.10
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-
|
||||
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Titanium
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Ti
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-
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≤0.10
|
-
|
||||
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Iron
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Fe
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Balance
|
53.0*
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Rest
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||||
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*:norminal valves, they should be adjusted
by the manufacturer so that the alloy meet the
requirement for CTE in different temperature
range
|
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A: We are a professional machining factory with
our own exporting office in Shanghai
A: Generally it is 30 days after your P/O issued
to us , it is according to quantity.
A: Yes, we could offer the kovar machined sample
for free, but don't afford freight.
A: Payment=1000 USD, 30% T/T in advance ,balance before shipment.
If you have any other question for machined metal
parts, please feel free to contact us as
below:
Room1301, No.889, Zhongjiang Road, Putuo District
One moment please
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