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Kovar Expansion Precision Alloy Ni29Co18 Uns K94610 ( 4J29 )

China Kovar Expansion Precision Alloy Ni29Co18 Uns K94610 (4J29), Find details about China Kovar Alloy Strip, Rodar from Kovar Expansion Precision Alloy Ni29Co18 Uns K94610 (4J29)

Origin
Shanghai
HS Code
75052200
Origin
Shanghai
HS Code
75052200
ovar Expansion Precision Alloy Ni29Co18 Uns K94610 (4J29)
 
Product Description
OhmAlloy-4J29  (Expansion alloy)

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.

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.

Physical Constants:
Density:8.17g/cm³
Specific gravity (g/cm3): 8.36
Melting point(ºC): 1450
Melting heat(calorie/g): 64
Vapour pressure (μ M): 1× 10-6 (1000ºC)
Specific heat(calorie/g/ºC): 0.105 (0ºC)
0.155 (430ºC)
Heat conductivity(calorie/cm· Sec. · ºC): 0.0395 (30ºC)
0.0485(300ºC)
Curie temperature (ºC): 435
γ α Phase-transition temperature(ºC): Below -80

Electrical performance:
Resistivity (μ Ω -mm): 49 (25ºC)
 
Varieties                    Steel type   
 
Specifications
mm		Precision
alloy		Resistance Alloys for electrical heatingSuper alloyWelding wireCorrosion resistant
alloy
Rodshot rolling rodsΦ8~38mmavailable available available
Cold-drawn rods≤50mmavailable available available
Forged rodsΦ38~350mmavailable available available
WiresRound wiresΦ0.3~8mmavailableavailableavailableavailableavailable
Non-circle wiresNegotiationavailable available available
StripsCold rolling0.15~4×200mmavailableavailableavailable available
Hot rolling4~22×200mmavailableavailableavailable available
PlatesCold rolling0.5~4×1000×2000mmavailable available available
Hot rolling4~22×1000×2000mmavailable available available
tubesΦ4~63×0.5~5mm       available available
Executive standard: GB, GJB, HB, YB, ASTM, AMSE, negotiation and so on.
 
Style of supply
Alloys NameTypeDimension 
OhmAlloy-4J29WireD= 0.1~8mm 
OhmAlloy-4J29StripW= 5~250mmT= 0.1mm
OhmAlloy-4J29FoilW= 10~100mmT= 0.01~0.1
OhmAlloy-4J29BarDia= 8~100mmL= 50~1000

Kovar Expansion Precision Alloy Ni29Co18 Uns K94610 (4J29)
Kovar Expansion Precision Alloy Ni29Co18 Uns K94610 (4J29)


 

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