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Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip

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Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip

Brand Name : OHMALLOY/OEM
Model Number : SP-OHMALLOY-4J29
Certification : Rohs/CE/SGS
Place of Origin : China
MOQ : 50KG
Price : USD 25-35 /KG
Payment Terms : L/C, T/T, Western Union, MoneyGram,Paypal
Supply Ability : 30 tons per month
Delivery Time : 5-8 working days after payment confirm
Packaging Details : Plywood case
Name : Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip Tube Bar Wire Plate
Material Shape : Bar/Strip/Plate/Tube(Customized)
Content : Ni29Co18
Application : Matching and sealing with the hard glass/Electric Vacuum
State : Soft/ 1/2 Hard/ Hard(Customized)
Feature : low coeffficient of expansion
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Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip Tube Bar Wire Plate


OhmAlloy-4J29 (Expansion alloy)
(Common Name: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12)
OhmAlloy-4J29 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 light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research. Most metals cannot seal to glass because their coefficient of thermal expansion is not the same as glass, so as the joint cools after fabrication the stresses due to the differential expansion rates of the glass and metal cause the joint to crack.


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.


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Chemical Composition

GradeC%P%S%Mn%Si%Cu%Cr%Mo%Ni%Co%Fe%
KovarMax 0.03Max 0.020Max 0.020Max 0.50Max 0.30Max 0.20Max 0.20Max 0.2028.5-29.516.8-17.8Bal.

Specifications

GradeUNSWerkstoff Nr.
KovarK946101.3981

Physical Properties

GradeDensityMelting Point
Kovar8.17 g/cm31449°C

Mechanical Properties

GradeTensile Strength N/mm²
Soft1/4 Hard1/2 Hard3/4 HardFull Hard
Kovar Strip<570520-630590-700600-770>700
Kovar Wire<585585-725655-795725-860>860

Coefficient of Expansion

AlloyLinear Coefficient of Thermal Expansion a,10-6/°C

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Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip Images

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