45 Alloy 46 Alloy Controlled Expansion Alloys: Machinability & Nominal Data
45 Alloy: With a relatively constant rate of thermal expansion to about 800°F (538°C), low expansion 45 Alloy has been used in thermostats, and its thermal expansion is similar to some alumina ceramics. High permeability 45 Alloy is a 45% nickel-iron alloy capable of exhibiting a high initial permeability and has been used predominantly in the telecommunications industry. National Electronic Alloys does not sell the High Permeability version of 45 Alloy.
46 Alloy: Consisting of 46% nickel and iron balance, 46 Alloy is a controlled expansion alloy used mostly in electronic applications, especially for glass and ceramic seals. Alloy 46 is also known as Pernifer 462, NILO 464, and Glass-Seal 461.
NOMINAL DATA SHEET