Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip

Product Details
Customization: Available
Product Type: Strip
Material: Fe,Ni, Co
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Number of Employees
15
Year of Establishment
2012-02-06
  • Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip
  • Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip
  • Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip
  • Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip
  • Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip
  • Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip
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Basic Info.

Model NO.
4J29
Status
Bright
Density(g/cm3)
8.17
Thermal Expansion Coefficient (10-6c)
5.0(20~300°c)
Curie Point(°c)
430
Volume Resistivity(Ohm.Cm)
46(20°c)
Thermal Conductivity(W/M. °c)
20.3
Yield Strength(MPa)
695
Tensile Strength
780
Elongation(%)
5
Hardness(Hv)
230
Transport Package
Cartons (40cm*40cm*50cm); Braided Bags, Spools
Specification
SGS
Trademark
Ualloy
Origin
Zhejiang, China
HS Code
9226999001
Production Capacity
500tons/Year

Product Description

Ni29co18/ Uns K94610 (4J29) Kovar Expansion Alloy Strip

1.Description:  

4J29(China); 29H, 29H-B, Techallony(Russia); Kovar, Rodar, Glasseal 29-17(United States); Nilo K, Telcaseal(Great Britain); KV-1, KV-2, KV-3(Japan); Dilver P0, Dilver P1(France); Vacon 12, Silvar 48(Germany).

4J29 expansion alloy, also known as Kovar alloy, is a Nickel Iron alloy with 29% Nickel, 17% Cobalt and the remaining balance is Iron. The expansion characteristics of Kovar match both borosilicate (or Pyrex) glasses and alumina ceramics, making it one of the most popular controlled expansion alloys for hermetic sealing applications. Kovar is produced to ensure good properties for machining and deep drawing, and is a porosity free product. You'll find Kovar in applications such as power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.
 
2. Chemical composition(%)
 

Grade

C

Si

Mn

P

S

Ni

Co

Fe

4J29

0.015

0.12

0.25

0.006

0.005

29.10

17.3

Bal

3. Physical properties
 

 
 
Grade

 
 
Density(g/cm3)

Thermal expansion coefficient (10-6/°C)

 
Curie point(°C)

 
Volume resistivity(μΩ.cm)

 
Thermal conductivity(W/m. °C)

4J29

8.17

5.0(20~300°C)
5.2(20~450°C

430

46(20°C)

20.3

4. Mechnical properties
 

 
 
Grade

 
Yield Strength(Mpa)

 
 
Tensile Strength

 
 
Elongation(%)

 
 
Hardness(HV)

 
4J29

Temper rolled

695

780

5

230

As annealed

315

520

24

148

5.Application
The alloy is widely used as glass sealing for electronic vacuum devices, such as launching tube, oscillating tube, ignitron, magnetron, transistor, sealing plug, relay, leading wire of integrated circuit, chassis, shell, scaffold and so on.
 
6.size
 Strips: Cold rolling   0.15~4×200mm
 Hot rolling    4~22×200mm

7.Advantages
1.Pass: ISO9001 certification 
2.fine after-sale services 
3.small order accepted 
4.samples available 
5.short delivery time 

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