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KOVAR
product details

KOVAR

KOVAR/Fe Ni Co alloy 4j29/ASTM F15/K94610/Nilo K

Application:

it is used to make Fe Ni Co alloy strip, bar, plate and tube matched withhard glass.

It is suitable for transmitting tube, oscillating tube, pilot tube,transistor, tube sealing plug, relay shell and other electric vacuum devices.

It has a certain coefficient of linear expansion in the temperature rangeof 20 - 450 , and can be matched with hard glass for firmsealing.

Availability:Strips, Bars, Wires, Flats.

Typical characteristics: FeNiCo Glass SealingAlloys take on a constant coefficient under -60~+40O. They can firmly match seal in hard glass.

Applications:FeNiCo Glass Sealing Alloys are fit formanufacturing electronic vacuum apparatus such as emitting tubes, oscillators,ignition rectifiers, transistors, pipe-closers and outer casings of relay.

Standard:     YB/T5235-93,Q/SYY 7-1999

Shape & dimension

Designation

Dimension/mm

KOVAR

Fe Ni Co alloy4j29

ASTM F15

K94610

Nilo K

Cold   rolled strip:

>0.03   to 0.1×180~250

>0.1   to 1.0×10~250

>1.0   to 3.0×100~250


Hot   forged rod or bar:

Φ20   to Φ100, or bar


Cold   drawn wire:

Φ0.1   to 6.0


Cold   drawn rod:

Φ2   to Φ12×10002000

Components%

Designation

C

P

S

Mn

Si

Cu

Cr

Mo

Ni

Co

Fe

KOVAR

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

Averagelinear expansion coefficient & tensile strength of strips

Designation

Heat treatment of the   sample

Average linear   expansion coefficient , a/10-6·K-1

Condition (symbol)

Tensile strength,

20~300

20~400

20~450

Σb/MPa

KOVAR

Heating to 900±20in hydrogen atmosphere, holding for 1 hour,   heating to

4.3~5.1

4.6~5.2

5.1~5.5

SoftR

570

1100±20, holding for 15 min, cooling to 200 at a rate less than 5/min, air cooling at last

4.6~5.2

1/4 hard1/4

520~630


CONTACT US
CONTACT / CHINA
If you have any needs or questions, please let us know.
We will give you an immediate response and provide you
with satisfactory services

Email:sales@czam-alloy.com

+86-13270375917

CHANGZHOU ALLOY MATERIAL
ADD

No 217 Huangshan St,xinbeiqu, changzhou, jiangsu, China


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