Product Specifications
| Prod Model: |
Kovaro alloy |
| Markets: |
North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe |
| Carbon Content: |
Low Carbon |
| Product Type: |
Strip/Sheet/Rod/Plate etc. |
| Material: |
Ni-Co-Fe |
Product Description
Description:
Kovar alloys are glass sealed and controlled expansion alloys
Kovar alloy also named ASTM F15, Nilo-k, UNS K94610(FeNi29Co17), Chinese 4J29
Specifications: ASTM F15; DIN 17745; S. E. W. 385; Werkstoff Nr. 1.3981; AFOR NF A54-301.
Detailed Description
Characteristics:
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.
Applications:
1. Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
2. 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.
Specification: Plate, sheet, strip, rod, bar, wire, tube.
Do you provide free samples?
Yes, we can provide a free sample for testing, If we have sample in stock, The quantity based on the material type, The buyer should bear all the shipping costs.
Please feel free to send us a inquiry and we are looking forward to cooperating with you!
Before you send us a inquiry, please confirm the following information
1. Alloy grade
2. Dimensions of the alloys
3. Surface requirements
4. Size tolerance requirement
5. Quantities
6. Package request
7. Specific end use
8. Other information that may be useful in supplying the most suitable products
1.Alloy grades and chemical composition consistent with the provisions of table 1
|
the chemical composition of Kovar(%) |
|
C |
P |
S |
Mn |
Si |
Cu |
Cr |
Mo |
Ni |
Co |
Fe |
|
Not more than(≤) |
|
|
|
|
0.03 |
0.020 |
0.020 |
0.5 |
0.30 |
0.20 |
0.20 |
0.20 |
28.5~29.5 |
16.8~17.8 |
Balance |
The content of Al\Mg\Zr and Ti should be no more than 0.10%,the total content should be no more than 0.20%.Otherwise ,the supplier's PO or contract shall indicate clearly. Under condition that the everage coefficient of linear expanion meets the requirements of the standard,the content of nickel and cobalt are allowed to deviate from the stated range.
2.The tensile strength of wire in line with the provisions of Table 2
|
Status code |
Status |
Tensile strength,N/mm2 |
|
R |
Soft |
<585 |
|
1/4I |
1/4 Hard |
585_725 |
|
1/2I |
1/2 Hard |
655_795 |
|
3/4I |
3/4 Hard |
725_860 |
|
I |
Hard |
>860 |
3.Strip tensile strength in line with the provisions of Table 3
|
Status code |
Status |
Tensile strength,N/mm2 |
|
R |
Soft |
<570 |
|
1/4I |
1/4 Hard |
520_630 |
|
1/2I |
1/2 Hard |
590_700 |
|
3/4I |
3/4 Hard |
600_770 |
|
I |
Hard |
>700 |
4.Alloy average linear expansion coefficient in line with the Table 4
|
Alloy Grade |
Specimen heat treatment system |
The average linear expansion coefficienta,10-6/ ºC |
|
20-300ºC |
20-400ºC |
20-450ºC |
|
kovar |
Heated to temperature of 900± 20ºCin the hydrogen,hold for 1h;re-heat to1100±20ºC, hold for 15min;cooled to 200ºC at a rate less than 5ºC. |
----- |
4.6-5.2 |
5.1-5.5* |
5.Alloy typical expansion coefficient
|
Alloy Grade |
The average linear expansion coefficient a,10-6/ ºC |
|
20-200ºC |
20-300ºC |
20-400ºC |
20-450ºC |
20-500ºC |
20-600ºC |
20-700ºC |
20-800ºC |
|
kovar |
5.9 |
5.3 |
5.1 |
5.3 |
6.2 |
7.8 |
9.2 |
10.2 |
|
|
|
Welcome to Hongxi Alloys.
Hongxi Alloys is an independent China based ISO accredited manufacture and trading house, supplying high quality specialty metal alloys throughout the world for industries requiring heat resistant, high temperature, corrosion resistant, and abrasion resistant alloys. All items are offered with an unconditional guarantee to be exactly as described.
Our dedicated, knowledgeable and experienced manufacturing and sales team are available to be of service to you.
We look forward to being able to assist you with your requirement.
What Does Hongxi Alloys Offer?
*High quality Nickel Alloys, Super Alloys, Precision Alloys, Nickel Chromium Alloys and Stainless Steels in an extensive range of products from stock and on forward order
*Competitive prices on small orders to large mill production
*Fast, reliable delivery times to any part of the world
*Fully certified material
*Top quality material conforming to internationally approved standards, giving guaranteed reliability
*Our own factory guarantees an uninterrupted supply to you of virtually any kind of metal products.
*Supplying various forms in plate, sheet, bar, tubing, pipe, flanges, fittings, wire and welding material.
Hongxi Alloys will source any alloy or steel to your exact specification or design on a fast, cost effective timescale.
