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Kovar( 4J29) hot rolled round bar

FOB Price

USD $10 - $30 / Kilogram

300 Kilograms(Min.Order)

Supply Ability 200 Ton / Tons per Month
Port Shanghai
Payment Terms:T/T

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Product Details

Place of Origin:	Jiangsu, China	Brand Name:	Zhonghai	Model Number:	Kovar
Application:	power tubes, microwave tubes, transistors, and diodes	Shape:	round	Material:	nickel-based alloy
Dimensions:	diameter range from 8.5mm to 80mm	Chemical Composition:	Ni-Cr-Fe

Product Description

Specifications

It has very low coefficient of heat expansion between the temperature of -250 and 200, good toughness and plastic

Product Description

Kovar alloy is a vacuum melted, iron-nickel-cobalt alloy that is widely used in the electronics industry. Kovar is a nickel-iron-cobalt, controlled-expansion alloy which contains 29% nickel. Its coefficient of expansion, which decreases with rising temperature to the inflection point, matches the expansion rate of borosilicate glasses and alumina ceramics.

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 integrated circuits, it has been used for the flat pack and the dual-in-line package.

Chemical Composition

Grade	C%	P%	S%	Mn%	Si%	Cu%	Cr%	Mo%	Ni%	Co%	Fe%
Kovar	Max 0.03	Max 0.020	Max 0.020	Max 0.50	Max 0.30	Max 0.20	Max 0.20	Max 0.20	28.5-29.5	16.8-17.8	Bal.

Specifications

Grade	UNS	Werkstoff Nr.
Kovar	K94610	1.3981

Physical Properties

Grade	Density	Melting Point
Kovar	8.17 g/cm3	1449°C

Mechanical Properties

Grade	Tensile Strength N/mm²
Grade	Soft	1/4 Hard	1/2 Hard	3/4 Hard	Full Hard
Kovar Strip	<570	520-630	590-700	600-770	>700
Kovar Wire	<585	585-725	655-795	725-860	>860

Coefficient of Expansion

Alloy	Linear Coefficient of Thermal Expansion a,10-6/°C
Alloy	20-200°C	20-300°C	20-400°C	20-450°C	20-500°C	20-600°C	20-700°C	20-800°C
Kovar	5.9	5.3	5.1	5.3	6.2	7.8	9.2	10.2

Contact Us

Xinghua Zhonghai Stainless Steel Products Co., Ltd.: Contact nameeve tang
Chat Now; Phone86-523-83764366; AddressIndustrial Concentration Area, Luome Village, Zhangguo Town, Xinghua

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Kovar( 4J29) hot rolled round bar

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