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Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Specifications
Brand Name :
XUNSHI
Model Number :
Kovar
Certification :
ISO9001:2015
Place of Origin :
China
MOQ :
20kg
Price :
Negotiable
Payment Terms :
T/T
Supply Ability :
1000kg per week
Delivery Time :
3-5 weeks
Packaging Details :
Wooden case
Material :
Fe-Ni-Co
Forms :
Strip, bar, wire, pipe
Equal grades :
4J29(China), ASTM F-15, NILO K, Pernifer 2918, Rodar, Dilvar P1, UNS K94610, 29-17 alloy
Size range :
20~300mm
Density :
8.36g/cm3
Tc :
430°C
Description

Kovar Controlled Expansion Alloy Hot Forged Round Bar for Glass Sealing Application

A-ONE ALLOY keeps in stock Kovar hot fogerd round bar from diameter 20mm to diameter 300mm. And we could make fast delivery for customized sizes as well as forged pieces.

Kovar controlled expansion alloy, most likely know as 4J29 in China, is a Nickel Iron alloy with 29% Nickel, 17% Cobalt and the remaining balance is Iron.

Kovar controlled expansion alloy, was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research area.

Kovar has thermal expansion similar to glass. Meanwhile its nonlinear thermal expansion curve can often be made to match a glass. This makes it the most popular controlled expansion alloy so far.

Chemical compostion of Kovar

Alloy % Ni Cr Co Cu C Mn Si P S Mo Fe
Kovar Min 28.5 16.8 Rem
Max 29.5 0.2 17.8 0.20 0.03 0.50 0.30 0.02 0.02 0.20

The average linear expansion coefficient(10-6C)

20~100°C 20~300°C 20~400°C 20~450°C 20~500°C 20~530°C 20~600°C
— — 4.6~5.2 5.1~5.5 — — —

Applications of Kovar

  • Light bulbs
  • Vacuum tubes
  • Cathode ray tubes
  • Power tubes
  • Microwave tubes
  • Transistoers
  • Diodes
  • Hybrid packages
  • Other kinds of scientific instruments

Forms available at A-ONE ALLOY

  • Bar
  • Tube
  • Strip
  • Wire
  • Plate
  • Capillary

Product tags

tempered glass installation

,

tempered glass trivet

,

how to install tempered glass
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Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy

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Product Detail
Brand Name :
XUNSHI
Model Number :
Kovar
Certification :
ISO9001:2015
Place of Origin :
China
MOQ :
20kg
Price :
Negotiable
Contact Supplier
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy
Hot Forged Controlled Expansion Kovar Alloy , Round Bar Glass Sealing Alloy

Suzhou Xunshi New Material Co., Ltd

Verified Supplier
8 Years
jiangsu
Since 2015
Business Type :
Manufacturer
Main Products :
Nickel Cobalt Alloy, Inconel Nickel Alloy, Soft Magnetic Alloys
Total Annual :
1000-1200
Employee Number :
100~120
Certification Level :
Verified Supplier
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