... known as Kovar, is a controlled expansion alloy consisting of 29% Nickel, 17% Cobalt, and balance Iron. Kovar is produced to ensure ... of electronic application, lead frames, especially for glass and ceramic seals. Alloy 42 is also known as Pernifer 42, NILO 42, and ... in a variety of electronic applications, especially for glass and ceramic seals. Alloy 46 is also known as Pernifer 46, NILO 464 ...