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Wisdom Import & Export (Shanghai) Co., Ltd.

Kovar Plate, Kovar Alloy Sheet, Nickel-Base Alloy Sheet manufacturer / supplier in China, offering Good Quality Kovar Plate, Swagelok Standard Stainless Steel NPT Male Swaged Hose Fittings, Metric Thread Bite Type Tube Fittings Replace Parker Fittings and Eaton Fittings (elbow fittings) and so on.

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Supplier Homepage Product SUPER ALLOY Good Quality Kovar Plate

Good Quality Kovar Plate

FOB Price: US $30 / kg
Min. Order: 10 kg
Min. Order FOB Price
10 kg US $30/ kg
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Production Capacity: 20 Tons Every Month
Transport Package: It Can Be Customized by The Clients′ Demand
Payment Terms: T/T, D/P, Western Union

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Basic Info
  • Model NO.: Kovar plate
  • Material: Fe Ni
  • Surface: Bright&Smooth
  • Type: Kovar Plate
  • Quality Test: Mill Test Report
  • MOQ: Based on The Size
  • Trademark: WISDOM
  • Origin: Shanghai, China
  • Product Type: Plate
  • Carbon Content: Low Carbon
  • Condition: Soft
  • Bar, Forging,and Wire Package: Standard Package
  • Payment Currency: USD/Eur/RMB
  • Country of Origin: Shanghai
  • Specification: A level of quality, e. g CE, RoHS, SGS, GMP, etc.
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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