Who makes Kovar?

CRS Holdings, inc.
Kovar (trademark of CRS Holdings, inc., Delaware) is a nickel–cobalt ferrous alloy compositionally identical to Fernico 1, designed to have substantially the same thermal expansion characteristics as borosilicate glass (~5 × 10−6 /K between 30 and 200 °C, to ~10 × 10−6 /K at 800 °C) to allow a tight mechanical joint …

Is Kovar hard to machine?

In the annealed condition, Kovar will be more difficult to machine because it is soft and gummy. The tools tend to plow the alloy instead of cutting into it and do not easily form chips. Surface scale oxide tightly adheres to and penetrates the surface to a greater extent than stainless steels.

What do you mean by Kovar?

Kovar in American English (ˈkoʊˌvɑr ) trademark. an alloy that consists mostly of iron, nickel, and cobalt, and has the same heat expansion properties as heat-resistant glass: it is usually fused to glass to form a gas seal.

Is Kovar stainless steel?

Kovar® is a nickel-iron-cobalt alloy with a coefficient of thermal expansion like that of hard glass.

How much does Kovar cost?

42 results:

Unit price:	$100.00
Form:	Wire/Rod
Diameter:	0.005 in. / 0.127 mm / 36 gauge
Purity:	29% Nickel, 17% Cobalt, 0.2% Manganese, balance Iron
Length:	25 ft. / 7.620 m

Is Kovar a metal?

materials. Kovar is an Iron-Nickel-Cobalt alloy, best known for having a similar coefficient of thermal expansion (CTE) to Borosilicate glass and other optical materials that allows for glass-to-metal bonds.

How do you anneal Kovar?

To restore to original condition, the material has to be annealed in hydrogen atmosphere at 899°C (1650° F) for 1 h. Then the temperature has to be raised to 1099°C (2010°F) and held for 15 min followed by cooling to room temperature for less than 1 h.

Is Kovar corrosion resistant?

Kovar end uses are usually glass sealing in the electronics industry. Though Nickel has good resistance and it is present at 29% – which is pretty high – you have to account for the 53% iron where the iron oxide has to be controlled for to prevent rusting.

Does Kovar oxidize?

The oxide formed on Kovar oxidised in air at 700 and 800 °C has been analysed and shown to be comprised of a layered structure with several different oxides, some of which have been previously overlooked in the literature.

Is Kovar ductile?

Forming. Good ductility makes KOVAR readily formable.

Is Kovar biocompatible?

It is important to note that neither Kovar nor copper can be used in bionic implants because neither metal is a biocompatible material.