... NILO K, Pernifer 2918, Rodar, and Dilvar P1.Alloy 42Alloy 42 is a controlled expansion alloy, consisting of 42% Nickel, balance Iron; used ... of electronic applications, especially for glass and ceramic seals. Alloy 46 is also known as Pernifer 46, NILO 464, and Glass ... -Seal 46.Alloy 48Alloy 48 is a controlled expansion alloy, consisting of 48% Nickel, balance Iron; ...