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Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Specifications
Brand Name :
JX
Model Number :
4j29 Kovar Alloy Round Bar
Certification :
ISO
Place of Origin :
china
MOQ :
100kgs
Price :
Negotiable
Payment Terms :
L/C, T/T
Supply Ability :
3000T
Delivery Time :
35days
Packaging Details :
Standard wooden case
Product Type :
Kovar Alloy Round Bar 4j29 Expansion Soft Alloy
Material :
Feni Alloy
Carbon Content :
low
Transport Package :
wooden case
Shape :
round bar
Condition :
soft
Surface :
Bright
Origin :
China
Description

Kovar Alloy Round Bar 4j29 Expansion Soft Alloy

4J29 Kovar Alloy Round Bar is also known as Kovar alloy. The alloy has a linear expansion coefficient similar to that of borosilicate hard glass at 20-450°C, a higher Curie point, and good low-temperature microstructure stability.
Kovar Alloy Round Bar has a linear expansion coefficient similar to that of borosilicate hard glass at 20-450°C, a higher Curie point, and good low-temperature microstructure stability. The oxide film of the alloy is dense and can be well wetted by glass. It does not interact with mercury, and is suitable for use in instruments containing mercury discharge. It is the main sealing structural material of electric vacuum devices.

Technical standard
YB/T 5231-1993 "Fe-Ni-Co glass sealing alloy 4J29 and 4J44 technical conditions".

Kovar Alloy Round Bar Chemical Composition in % Kovar


Ni
28,5-29,5%
Fe
51,14-54,5%
C
0.03%
Si
0.3%
Mn
0,4 %
S
o 0.015%

P
0.015%
o
17-18%
Ti
0.1%
Al
0.2%
Cu
0.2%
Cr
0,1 %

Kovar Alloy Round Bar Picture:
Round Kovar Based Alloy Bar 4j29 Expansion SoftRound Kovar Based Alloy Bar 4j29 Expansion Soft

Heat treatment system
The performance test samples for the expansion coefficient and low temperature microstructure stability specified in the standard are heated to 900ºC±20ºC in a hydrogen atmosphere, kept for 1h, then heated to 1100ºC±20ºC, and kept for 15min, at a temperature of not more than 5ºC/min The speed is cooled to below 200 ºC.

Application overview
The alloy is a typical Fe-Ni-Co hard glass sealing alloy commonly used in the world. It has been used for a long time in the aviation factory with stable performance. It is mainly used for glass sealing of electric vacuum components such as launch tubes, oscillator tubes, ignition tubes, magnetrons, transistors, sealed plugs, relays, integrated circuit lead wires, chassis, shells, brackets, etc. In the application, the selected glass should be matched with the expansion coefficient of the alloy. Strictly test its low temperature tissue stability according to the use temperature. Appropriate heat treatment should be carried out during processing to ensure that the material has good deep drawing properties. When using forgings, their air tightness should be strictly checked.

Product tags

silicon carbide ceramic tube

,

zirconium alloy bar

,

aluminum z bar extrusions
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Round Kovar Based Alloy Bar 4j29 Expansion Soft

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Product Detail
Brand Name :
JX
Model Number :
4j29 Kovar Alloy Round Bar
Certification :
ISO
Place of Origin :
china
MOQ :
100kgs
Price :
Negotiable
Contact Supplier
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft
Round Kovar Based Alloy Bar 4j29 Expansion Soft

JINXING MATECH CO LTD

Site Member
6 Years
Since 2007
Business Type :
Manufacturer, Distributor/Wholesaler, Importer, Exporter, Seller, Other
Main Products :
Zirconium Bar, Tungsten Copper Alloy, Tungsten Heavy Alloy
Total Annual :
5,000,000-10,000,000
Employee Number :
10~25
Certification Level :
Site Member
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