Nilo 42 Forging

A nickel-iron controlled-expansion alloy containing 42% nickel. It has a low and nominally constant coefficient of thermal expansion from room temperature to about 570°F (300°C). Used for semiconductor lead frames in integrated circuits, bi-metal thermostat strip, thermostat rods, for ceramic-to-metal seals with alumina ceramics and various glass-to-metal seals such as: the core of copper-clad wire for sealing into glass envelopes of electric bulbs, radio valves, television tubes and fluorescent lights.STANDARD PRODUCT FORMSStrip, plate and wire.MAJOR SPECIFICATIONSUNS K94100, ASTM F 29, F 30 , DIN 385,17745 , Werkstoff Nr. 1.3917LIMITING CHEMICAL COMPOSITION, %LimitingNi .....................42 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 .........0.15 max.Co ..........1.0 max.aNominal value; adjusted to meet expansionrequirements.PHYSICAL CONSTANTS AND THERMALPROPERTIESDensity, Ib/in3........................................................................0.293g/cm3.........................................................................8.11Melting Temperature (Approximate), °F........................2615°C ........................1435Inflection Point, °F..................................................................700°C ..................................................................370Thermal Conductivity, Btu • in/ft2 • h • °F..........................72.8W/m • °C ..........................................10.5Coefficient of Expansion, 68 – 212°F, 10-6in/in • °F........2.920 – 100°C, µm/m • °C ............5.368 – 572°F, 10-6 in/in • °F ..............2.5 –3.620 – 300°C, µm/m • °C ...................4.5 –6.5Electrical Resistivity, ohm • circ mil/ft...............................370µ Ω• m..............................................0.610TYPICAL MECHANICAL PROPERTIES(Annealed)Tensile Strength, ksi..................................................................71MPa............................................................490Yield Strength (0.2% Offset), ksi...........................................36MPa .....................................250Elongation, %..............................................................................43