Professional China Permalloy Alloy Sheet - 4J29-Kovar alloy strip Kovar bar/kovar sheet/kovar tube – Sekonic
Professional China Permalloy Alloy Sheet - 4J29-Kovar alloy strip Kovar bar/kovar sheet/kovar tube – Sekonic Detail:
Common Trade Names:Kovar Alloy,4J29,UNS K94610(FeNi29Co17),29HК Kovar,KV-1,29HК-BИ,Werkstoff Nr.1.3981
This alloy also caleed Glass sealed and controlled expansion alloy,The alloy has a linear expansion coefficient similar to that of silicon boron hard glass at 20-450°C, a higher Curie point, and good low-temperature structural stability. The oxide film of the alloy is dense and can be well wetted by glass . It does not interact with mercury and is suitable for use in mercury-containing discharge meters. It is the main sealing structure material for electric vacuum devices.
Kovar Alloy Chemical Composition
| C | Cr | Ni | Mo | Si | Mn | P | S | Fe | Co | Cu |
| ≤0.03 | ≤0.2 | 28.5-29.5 | ≤0.2 | ≤0.3 | ≤0.5 | ≤0.02 | ≤0.02 | balance | 16.8-17.8 | ≤0.2 |
Kovar Physical properties
| Density(g/cm3) | Thermal conductivity(W/m·K) | Electrical resistivity(μΩ·cm) |
| 8.3 | 17 | 45 |
Kovar Average expansion coefficient
| Alloy Grades
|
The average linear expansion coefficient a,10-6/ oC | |||||||
| 20-200
oC |
20-300
oC |
20-400
oC |
20-450
oC |
20-500
oC |
20-600
oC |
20-700
oC |
20-800
oC |
|
| kovar | 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
Kovar average linear expansion coefficient in line
| Alloy Grades | Specimen heat treatment system | The average linear expansion coefficient α,10-6/ oC | ||
| Kovar | 20-300 oC | 20-400 oC | 20-450 oC | |
| In hydrogen atmosphere heated to 900 ± 20 oC, insulation 1h, and then heated to 1100 ± 20 oC, insulation 15min, to not more than 5 oC / min rate of cooling to below 200 oC released | —– | 4.6-5.2 | 5.1-5.5 | |
Kovar typical expansion coefficient
| Alloy Grades | The average linear expansion coefficient a,10-6/ oC | |||||||
| Kovar | 20-200oC | 20-300 oC | 20-400oC | 20-450oC | 20-500oC | 20-600oC | 20-700oC | 20-800oC |
| 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 | |
Kovar Alloy Available Products in Sekonic Metals
Kovar Bars & Rods
Round bars/Flat bars/Hex bars, Size From 8.0mm-320mm, Used for bolts,fastners and other spare parts
Kovar wire
Supply in welding wire and spring wire in coil form and cut length.
Kovar sheet & plate
Widths up to 1500mm and lengths up to 6000mm,Thickness from 0.1mm to 100mm.
Kovar seamless tube & Caplliary Tube
Standards size and customized dimension can be produced by us with small tolerance
Kovar strip & coil
Soft condition and hard condition with AB bright surface, width up to 1000mm
Why Inconel Kovar ?
1.Kovar has a wide usage in the electronics industry, such as metal parts bonded to hard glass envelopes. These parts are used for such devices as power tubes and X-ray tubes, etc.
2.In the semiconductor industry kovar is used in hermetically sealed packages for both integrated and discrete circuit devices.
3.Kovar is provided in a variety of forms to facilitate efficient manufacturing of various metal parts. It has thermal expansion characteristics matching those of hard glass. Used for matched expansion joints between metals and glass or ceramics.
4.Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing, stamping and machining.
Kovar Alloy Application field：
● 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 intergrated circuits, it has been used for the flat pack and the dual-in-line package.
Product detail pictures:
Related Product Guide:
Why Cobalt based Alloys
Why Nickel Based Alloys ?
Our organization promises all customers with the first-class products and solutions and the most satisfying post-sale service. We warmly welcome our regular and new clients to join us for Professional China Permalloy Alloy Sheet - 4J29-Kovar alloy strip Kovar bar/kovar sheet/kovar tube – Sekonic , The product will supply to all over the world, such as: Malaysia, Botswana, Marseille, We supply skilled service, prompt reply, timely delivery, excellent quality and best price to our customers. Satisfaction and good credit to every customer is our priority. We focus on every detail of order processing for customers till they have received safe and sound items with good logistics service and economical cost. Depending on this, our products and solutions are sold very well in the countries in Africa, the Mid-East and Southeast Asia. Adhering to the business philosophy of ??customer first, forge ahead', we sincerely welcome clients from at home and abroad to cooperate with us.
By Edward from Slovenia - 2018.12.05 13:53
The company leader recept us warmly, through a meticulous and thorough discussion, we signed a purchase order. Hope to cooperate smoothly
By Caroline from Seychelles - 2018.06.18 19:26
