Precision alloy, buy UNS K94610 kovar plate 4J29 precision alloy on China Suppliers Mobile

Product Details

Product Description

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4J29

Precision alloy 4J29 is a Fe-Ni-Co alloy,and it has similar liner expansion coefficient with hard borosilicate glass under the temperature of 20-450℃, with high Curie point and good low-temperature stability.4J29 has tense oxide film and can be well wetted by the glass.

It is suitable for mercury discharge instrument because it doesn’t react with mercury.

4J29 alloy is the main material of sealing parts in electric vacuum devices.

Chemistry (%)

	Ni	Co	C	Fe	Mn	Si	Mo	Cr	Cu	P	S
MIN	28.5	16.8	-	-	-	-	-	-	-	-	-
MAX	29.5	17.8	0.03	Balance	0.5	0.3	0.2	0.2	0.2	0.02	0.02

Alloy Form

4J29 wire, strip, plate, pipe and rod

Chinese Grade

4J29

Common Trade Name

Russia

USA

U.K.

Japan

France

Germany

29HK

Kovar

Nilo K

KV-1

Dilver P0

Vacon 12

29HK-B

Rodar

Techallony Glasseal 29-17

Telcaseal

KV-2

KV-3

Dilver P1

Silvar 48

Features

High Curie point
Good low-temperature stability
Tense oxide film, and can be well wetted by the glass
No reaction with mercury
Good corrosion resistance in air, fresh water and sea water

Applications

Commonly used in aircraft factory, main material for glass sealing in electric vacuum devices, such as glass sealing for launch tube, oscillating tube, igniting tube, magnetron, transistors, sealing plugs, relays, IC lead, chassis, housings, brackets, etc.

Physical Properties

Melting temperature: 1450℃
Specific heat capacity: 440J/(kg•℃) at 0℃
Resistivity:ρ=0.48μΩ·m
Curie point: Tc=430℃

Thermal Conductivity

θ/℃	100	200	300	400	500
λ/(W/(m·℃))	20.6	21.5	22.7	23.7	25.4

Temperature Coefficient of resistance

Temperature/℃	20~50	20~85	20~100	20~200	20~300	20~400
αR/10-3℃-1	3.7	3.7	3.9	3.9	3.7	3.3

Magnetic Properties

H/(A/m)	B/T	H/(A/m)	B/T	H/(A/m)	B/T
8	0.9×10-2	80	0.35	2000	1.47
16	2.1×10-2	160	0.81	4000	1.61
24	3.6×10-2	400	1.17
40	8.3×10-2	800	1.34

At 4000A/m, remanence Br=0.98T, coercivity Hc=68.8A/m

Mechanical Properties

Hardness of Deep Drawing Strip

State	δ/mm	HV
Deep drawing	>2.5	≤170
Deep drawing	≤2.5	≤165

Tensile Strength of Wire and Strip

State number	State	σb/MPa
		Wire	Strip
S	Soft state	<585	<570
1/4H	1/4 hard state	585~725	520~630
1/2H	1/2 hard state	655~795	590~700
3/4H	3/4 hard state	725~860	600~770
H	Hard state	>850	>700

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Company Information

Shanghai Chonray Precision Alloy Co.,Ltd was founded in Year 2000, comprised of two major business sectors: Electric heating elements for industrial furnaces & special alloys. We have a manufacturing base in Shanghai City, specialized in electric heating elements for industrial furnaces. The other manufacturing base in Jiangsu Province is specialized in research and production of special alloys, including high resistance alloys, superalloys, corrosion resistant alloys, precision alloys, welding wires and so on. Based on 15 years experience of electric heating elements and 23 years experience of special alloys, Chonray has established long-term and strategic cooperation with many well-known companies abroad and at home.

Strictly implementing the quality management system ISO9001: 2008 and environment management system ISO14001, Chonray ensures the quality control with the solid technical force and advanced testing and analysis equipment .Our products are widely used in various fields, such as aerospace,chemical processing,medical,glass,oil and gas,power generation, and thermal process.

Guided by the philosophy of being professional, ethical and lawful ,environmental and social responsible, Chonray aims to provide best quality electric heating elements for industrial furnace and special alloys to customers worldwide. Chonray professional team is fully qualified to satisfy your sales, engineering and logistics requirements. We warmly welcome customers to visit our company.

Production line

Testing Equipment

Certification

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Our advantages and services

a. Our advantage

We can provide high quality material, excellent design, precise manufacturing,complete specifications, considerate and integrity serivices.

We can provide all kinds of electric heating alloy material and elements, including customized products.

We can provide a complete solution for you.

OEM service can be provided.

b. Technical services we can provide: