Nickel-Iron Alloy Nilo 52 or Invar 52 (Ni 51%) is a controlled expansion alloy. It has low or almost static coefficient of thermal expansion from ambient temperatures to 565oC or 1050oF. It also retains good strength and hardness even at the cryogenic temperatures. Nilo 52 is usually not cold processed due to risk of CTE damage. It can be annealed from 850oC to 1000oC or 1560oF to 1830oF. Low dispersion. Industrial Nomenclatures: Invar 52, Nickel alloy 52, Ni-Fe Alloy 52, Pernifer 50, W. NR 2.4478, HyRa49, HCR SR, 50Ni-Fe, Rectimmphy, FeNi5, AWS 093, UNS N14052 Alloy 52: UNS N14052, w.nr 2.4478 A controlled expansion alloy, consisting of 51% Nickel, balance Iron; used in a wide variety of electronic applications, especially for glass seals. Alloy 52 Products Bozhong Grop stocks Alloy 52 in a variety of forms and dimensions. Below are most of the standard stock form/sizes. If you do not see the size or form of Alloy 52 that you require, please call one of our materials experts; our sales people are very knowledgeable and can assist you. We can cut, slit, shear, or center less grind Alloy 52 to your exact specifications, and we also have tremendous versatility when it comes to custom sizes, packages, and unusual materials. Alloy 52 Rod Alloy 52 Rod Diameter Alloy 52 Rod Diameter .040” Alloy 52 Rod .156” Alloy 52 Rod .058” Alloy 52 Rod .187” Alloy 52 Rod .060” Alloy 52 Rod .1875” Alloy 52 Rod .0625” Alloy 52 Rod .250” Alloy 52 Rod .066” Alloy 52 Rod .500” Alloy 52 Rod .093” Alloy 52 Rod Alloy 52 Strip/Coil Annealed Alloy 52 Strip/Coil Thickness Alloy 52 Strip/Coil Thickness .010” Alloy 52 Strip/Coil .015” Alloy 52 Strip/Coil Applications Glass to metal seals for electronic tubes, automotive and industrial lamps, and specialty hermetic devices. Alloy 52 Properties Alloy 52 Physical Properties Density lb/cu in 0.3 Specific Gravity 8.3 Curie Temp °F 986 °C 530 Melting Point °F 2600 °C 1427 Electrical Resistivity Micro-ohm-cm 44 ohm-cir mil/ft 258 Thermal Conductivity W/cm °C 0.14 BTU-in/sq. ft-hr- 97 Specific Heat Cal/g- °C 0.12 BTU/lbm- °F 0.12 Thermal Expansion ppm / °F (75°F to 842°F) 5.5 ppm / °C (25°C to 450°F) 9.9 Alloy 52 Mechanical Properties Tensile Strength ksi 80 MPa 552 Yield Strength ksi 40 MPa 276 Elongation % in 2 in. 35 Typical Hardness Ann. Rockwell HRB 80 Modules of Elasticity Mpsi 23 kMPa 159 Alloy 52 Chemistry maximum % unless noted Iron Bal Nominal Nickel 50.5 Nominal Cobalt -- Carbon 0.05 Silicon 0.30 Sulfur 0.025 Chromium 0.025 Alloy 52 Specifications ASTM F-30 MIL 1-23011 CL 2 AMS 1-23011 CL 2 Alloy 52 Linear Coefficient of Thermal Expansion Degree C Degree C 30-100 10.5 30-450 9.6 - 10.7 30-150 10.5 30-475 10.1 30-200 10.4 30-500 10.0 30-250 10.4 30-525 10.4 30-300 10.2 30-550 10.2 - 10.7 30-325 -- 30-600 10.8 30-350 10.2 30-700 11.7 30-375 -- 30-800 12.5 30-400 10.1 30-900 13.3 30-425 -- 30-1000 14.2