China Copper Nickel Alloy Wire manufacturer
Shanghai Tankii Alloy Material Co.,Ltd
Shanghai Tankii Alloy Material Co.,Ltd First Quality, Sincere Service
11
Home > Products > Precision Alloy >

4j29 Kovar Nickel Expansion Alloy Strip For Integrated Circuits Framework

Browse Categories

Shanghai Tankii Alloy Material Co.,Ltd

City: shanghai

Province/State:shanghai

Country/Region:china

Tel:86-21-56110178

Contact Person:
Mr.Martin Lee
View Contact Details

4j29 Kovar Nickel Expansion Alloy Strip For Integrated Circuits Framework

Brand Name 4j29/ Kovar
Model Number STAM-29
Certification RoHs, ISO 9001
Place of Origin China
Minimum Order Quantity 30
Price USD 23-33/KG
Payment Terms T/T, L/C, Western Union
Supply Ability 5000 KG per month
Delivery Time 25 days
Packaging Details Wooden case
Properties Sealing Alloy
Shape Ribbon
Surface Bright (Silver)
Condition Soft
Application for sealing to glass
Size 0.1mm~2mm*10mm~22mm
Detailed Product Description

4j29 Kovar Nickel Expansion Alloy Strip For Integrated Circuits Framework

 

(Common Name: Kovar, NiFeCo29, NiCoFe294,Nilo K)

Controlled Expansion and Glass Sealing Alloys
German standard numberTradenameDINUNS
1.3912Alloy 3617745K93600/93601
1.3917Alloy 4217745K94100
1.3922Alloy 4817745K94800
1.3981Pernifer291817745K94610
2.4478NiFe 4717745N14052
2.4486NiFe47Cr17745-

General Description
Kovar is a nominal 29%Ni-17%Co-54%Fe alloy that is a well-known glass-sealing alloy suitable for sealing to hard glasses. Kovar has a nominal expansion coefficient of approximately 5 ppm/°C and inflection temperature of ~450 °C (840 °F).

4J29 also known as Fe-Ni-Co Glass Sealing Alloy. it was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research.

Kovar (ASTM F15) has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials. This alloy has found wide application in power tubes, microwave tubes, transistors, and diodes. In integrated circuits, it has been used for the flat pack and the dual-in-line package.

Mainly used in electric vacuum components and emission control, shock tube, igniting tube, glass magnetron, transistors, seal plug, relay, integrated circuits lead, chassis, brackets and other housing sealing.

Chemical Domposition

alloyCMnSiPSNiCrCoCuMoFe
4J29≤0.03≤0.50≤0.30≤0.020≤0.02028.5~29.5≤0.2016.8~17.8≤0.2≤0.2balance

Tensile Strength, MPa

Code of conditionConditionWireStrip
RSoft≤585≤570
1/4I1/4 Hard585~725520~630
1/2I1/2 Hard655~795590~700
3/4I3/4 Hard725~860600~770
IHard≥850≥700

Typical Physical properties

Density (g/cm3)8.2
Electrical resistivity at 20ºC(OMmm2/m)0.48
Temperature factor of resistivity(20ºC~100ºC)X10-5/ºC3.7~3.9
Curie point Tc/ ºC430
Elastic Modulus, E/ Gpa138


The heat treatment process

Annealing for stress reliefHeated to 470~540ºC and hold 1~2 h. Cold down
annealingIn vacuum heated to 750~900ºC
Holding time14 min~1h.
Cooling rateNo more than 10 ºC/min cooled to 200 ºC

Coefficient of expansion

θ/ºCα1/10-6ºC-1θ/ºCα1/10-6ºC-1
20~607.820~5006.2
20~1006.420~5507.1
20~2005.920~6007.8
20~3005.320~7009.2
20~4005.120~80010.2
20~4505.320~90011.4

Thermal conductivity

θ/ºC100200300400500
λ/ W/(m*ºC)20.621.522.723.725.4

Style of supply

Alloys NameTypeDimension 
4J29WireD= 0.1~8mm 
4J29StripW= 5~250mmT= 0.1mm
4J29FoilW= 10~100mmT= 0.01~0.1mm
4J29BarDia= 8~100mmL= 50~1000mm

 

 

The name Kovar is often used as a general term for Fe-Ni alloys with these particular thermal expansion properties. Note the related particular Fe-Ni alloy Invar which exhibits minimum thermal expansion.
 
TANKII, referring to the presence of high-power production, offers customers buy alloy Kovar in the required quantities and ensures minimum time shipments of rolled metal products, made on the basis of Kovar.

 

If you have any questions, pls give us message to zlz@tankii.com

Hope we can cooperate with you!

Have a good day!

 

Product Tags: Integrated Circuits Framework Expansion Alloy Strip   4j29 Kovar Nickel Expansion Alloy Strip     
Related Products
Email to this supplier
 
From:
Enter your Email please.
To: Shanghai Tankii Alloy Material Co.,Ltd
Subject:
Message:
Characters Remaining: (80/3000)