4J44|Kaixin Alloy Materials Co., Ltd.-specializes in high-temperature alloys-corrosion-resistant alloys-expansion alloys-pure nickel alloys and other strips-wires-rods

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Danyang Kaixin Alloy Material Co., Ltd.

4J44

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 series: perminvar

Implementation standards：YB/T 5231

Application fields: Industry, telecommunication, medical field

Product description and application

Alloy 44 has a certain coefficient of linear thermal expansion over a certain temperature range. It is used to make Fe-Ni-Co alloy strip, bar, plate and pipe with hard glass matching sealing. It is suitable for electric vacuum devices such as emission tube, oscillation tube, ignition tube, transistor, tube seal plug and relay shell.

4J44Composition content

Fe：53.85%~55.83%

Ni：34.2%~35.2%

Co：8.5%~9.5%

Mn≤0.5%

Si≤0.3%

Cu≤0.2%

Cr≤0.2%

Mo≤0.2%

C≤0.03%

P≤0.02%

S≤0.02%

Vacuum induction furnace

Electroslag remelting

Product physical properties

Melting temperature

1430℃

Mechanical properties

Status		Tensile strength

M（Soft state）		<585
¼H（Hard state）		585～725
½H（Hard state）		655～795
¾H（Hard state）		725～860
H（Hard state）		＞860

4J44 Average linear expansion coefficient:

Alloy designation	Sample heat treatment regime	Average linear expansion coefficient α,10^-6/ ℃

4J44	It is heated to 900± 20℃ in a hydrogen atmosphere, held for 1 hour, then heated to 1100±20℃, held for 15min, and cooled to 200℃ or less at a speed of no more than 5℃/min.	20～ 300 °C	20～ 400 °C
		4.3-5.1	4.6-5.2

Appendix: Typical coefficient of thermal expansion of the alloy

Alloy	Average linear expansion coefficient α（10^-6/ K）
Alloy	Average linear expansion coefficient α（10^-6/ K）
Brand	20～ 200°C	20～ 300 °C	20～ 400 °C	20～ 450 °C	20～ 500 °C	20～ 600 °C
4J44	4.9	4.6	4.9	5.9	6.8	8.7

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