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Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin

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Shanghai Tankii Alloy Material Co.,Ltd

City: shanghai

Province/State:shanghai

Country/Region:china

Tel:86-21-56110178

Contact Person:
Mr.Martin Lee
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Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used For Plastic Pin

Brand Name TANKII
Model Number Kovar Alloy
Certification ISO SGS
Place of Origin Shanghai, China,
Minimum Order Quantity Negotiable
Price negotiable
Payment Terms L/C, T/T, Western Union
Supply Ability 1000000 Pcs per Month
Delivery Time 7-15 work days
Packaging Details wooden case / Carton
Material Fe-Ni-Co Alloy
Diameter 1.00mm Min
Wall thickness 0.02mm Min
Length customized
Sample Accepted
Surface Bright / Polished
Detailed Product Description

Kovar / Nifeco29 / Nilo K / 4J29 Alloy Tubes / Pipes Used for Plastic Pin

(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 Composition

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

 

 

Product Tags: high temperature metal alloys   high temperature wire  
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