E-mailsales@ualloy.com

Contact Us+8618072739736

Search

From Factory Glass Sealing Alloy Strip Kovar/Dilver Po/4j29

Description

4J29 is also known as Kovar alloy. it was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as lig bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other...

Share:

Content_1

Content_2

ProInfoAttach

ProDetailSubTitle2

From factory Glass Sealing Alloy Strip Kovar/Dilver Po/4J29

(Common Name: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12, ASTM F15, W.Nr 1.3912, UNS K94610 Ni29Co18)

FeNiCo Glass Sealing Alloys
Grade4J29,4J44
SizeStrip:(0.03-0.1)mm*(180-250)mm
(0.1-1.0)mm*(10-250)mm
(1.0-3.0)mm*(100-250)mm
Wire:0.1-6.0mm
Bar:20-100mm(Hot forging)
       2.0-20mm(Cold drawing)
FeaturesIt has a certain linear expansion coefficient in the temperature range of -60ºC ~ + 400ºC, which can be matched with hard glass to seal firmly
ApplicationSuitable for 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.


Normal composition%

GradeCPSMnSiCuCrMoNiCoFe
4J290.030.020.020.50.30.20.20.228.5-29.516.8-17.8Bal.
4J440.030.020.020.50.3≤0.20.20.234.2-35.28.5-9.5Bal.


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(Om*mm2/m)0.48
Temperature factor of resistivity(20ºC~100ºC)X10-5/ºC3.7~3.9
Curie point   Tc/ ºC430
Elastic Modulus,  E/ Gpa138


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

 

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 time  14 min~1h.
Cooling rateNo more than  10 ºC/min cooled to 200 ºC

1

Hot Tags: from factory glass sealing alloy strip kovar/dilver po/4j29, manufacturers China, suppliers, factory, buy, low price, discount, quotation