Productdetails
Plaats van herkomst: Sjanghai, China
Merknaam: TANKII
Certificering: ISO9001
Modelnummer: Kovar
Betaling & het Verschepen Termijnen
Min. bestelaantal: 5 kg
Prijs: Onderhandelbaar
Verpakking Details: Karton + Wooned-Geval
Levertijd: 7-20 dagen
Betalingscondities: L/C, T/T, Western Union
Levering vermogen: 10 ton per maand
Materiaal: |
Nikkel-ijzer-kobaltlegering buis |
O.D: |
0,3 mm min. |
GEW: |
0.01mm min. |
Lengte: |
0,3 mm min. |
Oppervlak: |
Helder oppervlak |
Steekproef: |
aanvaard kleine bestelling |
Materiaal: |
Nikkel-ijzer-kobaltlegering buis |
O.D: |
0,3 mm min. |
GEW: |
0.01mm min. |
Lengte: |
0,3 mm min. |
Oppervlak: |
Helder oppervlak |
Steekproef: |
aanvaard kleine bestelling |
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).
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.
Chemical Composition in % Kovar
Ni 28,5-29,5% |
Fe 51,14-54,5% |
C 0.03% |
Si 0.3% |
Mn 0,4 % |
S o 0.015% |
P 0.015% |
Co 17-18% |
Ti 0.1% |
Al 0.2% |
Cu 0.2% |
Cr 0,1 % |