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Danyang Kaixin Alloy Material Co., Ltd.
4J33
Product properties:

Brand: KX-Alloy

Similar grades:-

Certification certificate:ISO9001:2015

Place of Origin: Danyang, Jiangsu, China

Product Description

Alloy Category:Expansion alloy

Substrate shape: wire/strip/rod/pipe/plate

Alloy seires:perminvar

Executive standard: YB/T5231

Application field: Industrial field

Product description and application

4J33 is a fixed expansion ceramic sealing alloy, which is a ceramic sealing alloy developed according to the characteristics of China's ceramics. In the temperature range of -60℃ ~ 600℃, the linear expansion coefficient of the alloy is similar to that of 95%Al2O3 ceramics. It is mainly used for matching sealing with ceramics, and is an important sealing structural material in electric vacuum industry.

4J33Composition content
Fe:50.33%~53.03%
Ni:32.1%~33.6%
Co:14.0%~15.2%
Mn≤0.5%
Si≤0.3%
C≤0.03%
P≤0.02%
S≤0.02%
Vacuum induction furnace
Electroslag remelting
Product physical properties
Density

ρ=8.27 g/cm³

Melting temperature

1450℃

Mechanical properties

The tensile strength of the wire:

Status code Status Tensile strength/MPa
R Soft state ≤585
I Hard state ≥860

 

 

 

Tensile strength of strip:

Status code Status Tensile strength/MPa
R Soft state ≤570
I Hard state ≤700

Product average linear expansion coefficient:

Alloy designation Sample heat treatment regime Average linear expansion coefficient α/(10-6/ K)
20~ 400 ℃ 20~ 500 ℃
4J33 It is heated to 900±20 ℃ in a protective atmosphere or vacuum, held for 1h, and cooled to less than 200 ℃ at a speed of no more than 5 ℃ / min 6.0~6.8 6.6~7.4

Product typical mean linear expansion:

Alloy designation Average linear expansion coefficient in different temperature ranges α/(10-6/ K)
20~ 200 ℃ 20~ 300 ℃ 20~400 ℃ 20~500℃ 20~600℃
4J33  7.1  6.5 6.3 7.1 8.5
 
 
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Application scenario