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Categories | Nickel Based Alloys |
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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 |
Company Info. |
JINXING MATECH CO LTD |
View Contact Details |
Product List |
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:
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.
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