Good Quality Kovar Plate

Product Type: Plate
Material: Fe Ni
Carbon Content: Low Carbon
Surface: Bright&Smooth
Condition: Soft
Type: Kovar Plate
Customization:

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Basic Info.

Model NO.
Kovar plate
Bar, Forging,and Wire Package
Standard Package
Quality Test
Mill Test Report
Payment Currency
USD/Eur/RMB
MOQ
Based on The Size
Country of Origin
Shanghai
Transport Package
It Can Be Customized by The Clients′ Demand
Specification
A level of quality, e. g CE, RoHS, SGS, GMP, etc.
Trademark
WISDOM
Origin
Shanghai, China
Production Capacity
20 Tons Every Month

Product Description


Kovar Alloy
General 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%
KovarMax 0.03Max 0.020Max 0.020Max 0.50Max 0.30Max 0.20Max 0.20Max 0.2028.5-29.516.8-17.8Bal.

Specifications

Grade
UNSWerkstoff Nr.
KovarK946101.3981

Physical Properties

Grade
DensityMelting Point
Kovar8.17 g/cm31449°C

Mechanical Properties

Grade
Tensile Strength N/mm²
Soft1/4 Hard1/2 Hard3/4 HardFull Hard
Kovar Strip<570520-630590-700600-770>700
Kovar Wire<585585-725655-795725-860>860

Coefficient of Expansion

Alloy
Linear Coefficient of Thermal Expansion a,10-6/°C
20-200°C20-300°C20-400°C20-450°C20-500°C20-600°C20-700°C20-800°C
Kovar5.95.35.15.36.27.89.210.2

Size Range
Kovar Wire: 0.1mm-9mm
Kovar Bar: 11mm-200mm
Kovar Strip: 75-110mm*0.15-22mm
Seamless and welded tubes also availabla per request

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