Nilo 48 Round Bar

A nickel-iron controlled-expansion alloy containing 48% nickel. Its coefficient of thermal expansion is designed to match that of soft lead and soda-lime glasses. The alloy also has a high inflection point. Used for glass-to-metal seals in radio valves and incandescent electric light bulbs and for industrial thermostats that operate at temperatures up to 840°F (450°C).STANDARD PRODUCT FORMSWire.MAJOR SPECIFICATIONSUNS K94800, ASTM F 30, DIN 17745, Werkstoff Nr. 1.3922, Werkstoff Nr. 1.3922, LIMITING CHEMICAL COMPOSITION, %Ni .....................48 aFe ......RemainderC ..........0.05 max.Mn .......0.80 max.P ........0.025 max.S .......0.025 max.Si .........0.30 max.Cr .........0.25 max.Al .........0.10 max.Co ..........1.0 max.aNominal value; adjusted to meet expansionrequirements.PHYSICAL CONSTANTS AND THERMALPROPERTIESDensity, Ib/in3........................................................................0.296g/cm3.........................................................................8.20Melting Temperature (Approximate), °F........................2640°C ........................1450Inflection Point, °F..................................................................860°C..................................................................460Thermal Conductivity, Btu • in/ft2 • h • °F...........................116W/m • °C ..........................................16.7Coefficient of Expansion, 68 – 212°F, 10-6in/in • °F........4.720 – 100°C, µm/m • °C ............8.568 – 752°F, 10-6 in/in • °F ..............4.6 –5.220 – 400°C, µm/m • °C ...................8.3 –9.3Electrical Resistivity, ohm • circ mil/ft...............................280µ Ω• m..............................................0.470TYPICAL MECHANICAL PROPERTIES(Annealed)Tensile Strength, ksi..................................................................75MPa............................................................520Yield Strength (0.2% Offset), ksi...........................................38MPa .....................................260Elongation, %..............................................................................43