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Kovar 4j29 Nickel Alloy Uns Kovar Strip-Feni29 Kovar Alloy Stirp1
Non-ferrous Metal ProductsKovar4j29
Huona (Shanghai) New Material Co., Ltd.
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Product Description Kovar 4J29 Nickel Alloy Uns Kovar Strip-FeNi29 Kovar Alloy StirpClassification : the alloy of expansion characteristicsApplication: Kovar (trademark of CRS Holdings, inc., Delaware[1]) is a nickel-cobalt ferrous alloy compositionally identical to Fernico 1, designed to be compatible with the thermal expansion characteristics of borosilicate glass (~5 × 10?6 /K between 30 and 200 °C, to ~10 × 10?6 /K at 800 °C) in order to allow direct mechanical connections over a range of temperatures. It finds application in electroplated conductors entering glass envelopes of electronic parts such as vacuum tubes (valves), X-ray and microwave tubes and some lightbulbs. Chemical Composition in % Kovar Ni28,5-29,5%Fe51,14-54,5%C0.03%Si0.3%Mn0,4 %So 0.015%P0.015%o17-18%Ti0.1%Al0.2%Cu0.2%Cr0,1 % The thermal properties of alloy Temperature coefficient of linear expansion αsr ? 10-6 K-1 in the temperature range, ° Cinflection point temperature, ° CNo lessHeat treatment regime blanks and samples20-8020-10020-30020-40020-45020-50020-800--4,6-5,64,6-5,2-5,9-6,4-420samples and blanks annealing in hydrogen, a vacuum or protective atmosphere at a temperature (960 ± 20) ° C, holding 1 hr., cooling with the furnace or container to 200 ° C at a rate not exceeding 10 ° C / minPropertysinteredHIPedDensity / g cm38.08.35Hardness / HV1160150Youngs Modulus / GPa138138reduction of area at fracture / %3030yield strength / MPa270270thermal conductivity / W/Km17Curie Temperature / °C435electrical resistivity Ω mm2 / m0.49specific heat J/gK0.46thermal expansion coefficient/10?6 K?1 (25 - 200 °C)5.5(25-300 °C)5.1(25-400 °C)4.9(25-450 °C)5.3(25-500 °C)6.2Kovar 4J29 Nickel Alloy Uns Kovar Strip-FeNi29 Kovar Alloy StirpThe name Kovar is often used as a general term for Fe-Ni alloys with these particular thermal expansion properties. Note the related particular Fe-Ni alloy Invar which exhibits minimum thermal expansion. We referring to the presence of high-power production, offers customers buy alloy Kovar in the required quantities and ensures minimum time shipments of rolled metal products, made on the basis of Kovar.
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