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Help CenterBest of China,glass to Metal Seal Materials, Kovar Alloy With ASTM,GOST,SGS Standards
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Kovar Alloy, also know as ASTM F-15, NILO K, Pernifer 2918, Rodar, and Dilvar P1 is a controlled expansion alloy. It is a Nickel Iron alloy with 29% Nickel, 17% Cobalt and the remaining balance is Iron. 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 is produced to ensure good properties for machining and deep drawing, and is a porosity free product. You’ll find Kovar in applications such as power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.
Kovar Alloy Chemistry
maximum % unless noted | |
Iron |
Balance |
Nominal Nickel |
29% |
Nominal Cobalt |
17% |
Carbon |
0.02% |
Silicon |
0.20% |
Sulfur |
-- |
Chromium |
0.20% |
Kovar Alloy Physical Properties
Density |
lb/cu in |
0.302 |
Specific Gravity |
|
8.36 |
Curie Temp |
°F / °C |
815/ 435 |
Melting Point |
°F / °C |
2640/ 1449 |
Electrical Resistivity |
Micro-ohm-cm / Micro-ohm-cm |
40/ 294 |
Thermal Conductivity |
W/cm °C / BTU-in/sq. ft-hr- |
0.17/ 120 |
Specific Heat |
Cal/g- °C / BTU/lbm- °F |
0.11/ 0.11 |
Thermal Expansion |
ppm/°F (75°F to 842°F) / ppm/°C (25°C to 450°F) |
2.9/ 5.3 |
Kovar Alloy Mechanical Properties
Tensile Strength |
Ksi MPa |
75 518 |
Yield Strength |
Ksi MPa |
40 276 |
Elongation |
% in 2 in |
30 |
Typical Hardness Ann |
Rockwell |
HRB80 |
Modulus of Elasticity |
Mpsi KMPa |
30 207 |
Kovar Alloy Linear Coefficient of Thermal Expansion
Degree C |
|
DegreeC |
|
30-100 |
--- |
30-450 |
5.1 - 5.5 |
30-150 |
--- |
30-475 |
---------- |
30-200 |
5.5 |
30-500 |
6.2 |
30-250 |
--- |
30-525 |
---- |
30-300 |
5.1 |
30-550 |
----- |
30-325 |
-- |
30-600 |
7.9 |
30-350 |
----- |
30-700 |
9.3 |
30-375 |
----- |
30-800 |
10.4 |
30-400 |
4.6 - 5.2 |
30-900 |
11.5 |
30-425 |
------- |
30-1000 |
-- |
Specification
Kovar Specifications | ||
ASTM F-15/F-1466 |
MIL 1-23011 CL 1 |
AMS 1-23011 CL 1 |
According the characteristic of material ,suitable packing and follow China Customs regulations, or As buyer's request .
Delivery items are flexiable , Shipping, Air lift ,train , hight speed ground transportation ,ect
Power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments
1, sample free
2, faster delivery
3, helpful staff
4, quick response
6, testing before shipping
7, We will reply you for your inquiry in 24 hours.
8, advanced facilities
9. technical support
10.No min order request
1.Q: How can i trust this factory ?
A:You can visit our website , Our factory 's License and certificate appear on the website .(License Number can check the aptitude of the factory on chinese Gov wed ,English version avaliable )
2.Q:Is this factory far away from the port? Is this will take longer for delivery?
A:From xi'an to any port in china with in one day , convenience transportation only can improve the delivery.
3.Q: Where is your factory located? How can I visit there?
A:Our factory is located in xi'an, Shaanxi Province, China.
All our clients from all over the world , are warmly welcome to visit us! free pick up !
4. Q: How can I get some samples?
A: We are honored to offer you samples.(sample will delivery as our stock size)
5.Q: How does your factory do regarding quality control?
A. Quality is priority. our factory have advanced facilities,High qualified technical personnel and technical support and always attach great importance to quality controlling from beginning to end.
XAGY supplies the highest quality special purpose metals and alloys for Aerospace/Aviation, Defense, Electronics, Magnetic, Medical, Lighting, Optical, Telecommunications, Ceramics, Heat Treating, and other high-technology industries.
For any further INFO please visit : OR email at :supportsales©
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