现货Kovar可伐合金4J29膨胀系数多少--蒙镍销售部

【论文】可伐合金4J29铁镍钴合金分析与研究【蒙镍技术部】

铁镍钴合金4J29（Kovar,可伐合金，科瓦合金，ASTMF-15）

用途:用于制作与硬玻璃匹配封接的铁镍钴合金带材,棒材,板材,管材。
适用于发射管、振荡管、引燃管、晶体管以及管封插头、继电器外壳等电真空器件。
在20℃-450℃温度范围内具有一定的线膨胀系数，能与硬玻璃进行匹配牢固封接。

相近牌号

4J29 的化学成分:

平均线膨胀系数（10-6℃:

4J29合金在较宽的温度范围(-80~450℃)内膨胀系数与硬玻璃的膨胀系数相近，在电真空工业中，用来与硬玻璃封接制造高气密性元器件，也可以和陶瓷封接。名称：铁镍钴玻封合金。在 20～450 ℃具有与 硅硼硬玻璃相近的热膨胀系数，居里点高，具有良好的低温组织稳定性。为铁镍钴玻封合金。

以上资料由上海蒙镍特种合金有限公司科研中心提供，如有转载，请麻烦告知

Kovar alloycapillary 1.5*0.2 spot

Analysis andResearch on Kevar 4J29 Fe-Ni-Co alloy

Fe-ni-coalloy 4J29 (Kovar, Kovar, Kovar, ASTM F-15)

Uses: usedfor making iron nickel cobalt alloy strip, bar, plate and pipematched with hard glass sealing.

Suitable fortransmitting tube, oscillating tube, ignition tube, transistor,tube seal plug, relay shell and other electrical vacuumdevices.

In thetemperature range of 20℃-450℃ has a certain linear expansioncoefficient, can match with hard glass firmsealing.

Close to thebrand

GB/T

AISI/ASTM

JIS

W.Nr

4J29

F15

EMAS-1001

1.3912

Chemicalcomposition of 4J29:

alloy

%

nickel

chromium

iron

cobalt

copper

carbon

manganese

silicon

phosphorus

sulfur

molybdenum

*small

28.5

allowance

16.8

*big

29.5

0.2

17.8

0.20

0.03

0.50

0.30

0.02

Averagelinear expansion coefficient (10-6℃:

20 ~ 100℃

20 ~ 300℃

20 ~ 400℃

20 ~ 450℃

20 ~ 500℃

20 ~ 530℃

20 ~ 600℃

4.6 ~5.2

5.1 ~5.5

Theexpansion coefficient of 4J29 alloy is similar to that of hardglass in a wide temperature range (-80~450℃). In the electricvacuum industry, it can be used to seal with hard glass to makehigh air tightness components, and also can seal with ceramics.Name: Iron nickel cobalt glass seal alloy. At 20 ~ 450 ℃, it hassimilar thermal expansion coefficient with borosilicate hard glass,high Curie point, and good microstructure stability at lowtemperature. For iron nickel cobalt glass sealalloy.

The aboveinformation is provided by the scientific research center ofShanghai Mengni Special Alloy Co., LTD. If reprinted, please kindlyinform us