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Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Specifications
Brand Name :
4j29/ Kovar
Model Number :
STAM-29
Certification :
RoHs, ISO 9001
Place of Origin :
China
MOQ :
30
Price :
USD 23-33/KG
Payment Terms :
T/T, L/C, Western Union
Supply Ability :
5000 KG per month
Delivery Time :
25 days
Packaging Details :
Wooden case
Properties :
Sealing Alloy
Shape :
Ribbon
Surface :
Bright (Silver)
Condition :
Soft
Application :
for sealing to glass
Size :
0.1mm~2mm*10mm~22mm
Description

Resistohm 70 NiCr 70/30 Nikrothal 70 Chromel 70/30 HAI-NiCr 70 Cronix 70 Inalloy 70 X30H70 High Temperature Resistance Alloy

Classification : the alloy of expansion characteristics

Application: Kovar (trademark of CRS Holdings, inc., Delaware[1]) is a nickel-cobalt ferrous alloy compositionally identical to Fernico 1, designed to be compatible with the thermal expansion characteristics of borosilicate glass (~5 × 10?6 /K between 30 and 200 °C, to ~10 × 10?6 /K at 800 °C) in order to allow direct mechanical connections over a range of temperatures. It finds application in electroplated conductors entering glass envelopes of electronic parts such as vacuum tubes (valves), X-ray and microwave tubes and some lightbulbs.

Chemical Composition in % 4j29 / Kovar

Chemical composition
C P S Mn Si Ni Cr Mo Cu Co Fe
≤
0.03 0.02 0.02 ≤0.5 ≤0.3 28.5~29.5 ≤0.2 ≤0.2 ≤0.2 16.8~17.8 Bal.

The Mechanical properties of 4j29 / Kovar

Mechanical properties
Коэффициент линейного
расширения		 Удельное
электросопротивление		 Плотность Точка
Кюри		 Модуль упругости Теплопроводность
Coefficient of linear expansion Electrical resistivity Density Curie point Elastic Modulus
Thermal conductivity
α1(20~200℃)/10-6℃-1 ρ/(μΩ*m) ρ/(g/cm3) Tc/ ℃ E/ Gpa λ/ W/(m*℃)
4.6~5.2 0.48 8.2 430 138 20.6(100℃)

The name Kovar is often used as a general term for Fe-Ni alloys with these particular thermal expansion properties. Note the related particular Fe-Ni alloy Invar which exhibits minimum thermal expansion.
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
TANKII, referring to the presence of high-power production, offers customers buy alloy Kovar in the required quantities and ensures minimum time shipments of rolled metal products, made on the basis of Kovar.

If you have any questions, pls give us message to zlz@tankii.com

Hope we can cooperate with you!

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Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts

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Product Detail
Brand Name :
4j29/ Kovar
Model Number :
STAM-29
Certification :
RoHs, ISO 9001
Place of Origin :
China
MOQ :
30
Price :
USD 23-33/KG
Contact Supplier
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts
Precision Alloy 4J29 Designed for Thermal Expansion Compatibility with Borosilicate Glass in Electronic Parts

Shanghai Tankii Alloy Material Co.,Ltd

Verified Supplier
11 Years
shanghai, shanghai
Since 1981
Business Type :
Manufacturer, Exporter
Main Products :
Copper Nickel Alloy Wire, Electric Resistance Wire, Thermocouple Bare Wire
Total Annual :
8000000-100000000
Employee Number :
90~100
Certification Level :
Verified Supplier
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