Special Metals NILO® Alloy 48 Controlled-Expansion Alloy

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Special Metals NILO® Alloy 48 Controlled-Expansion Alloy
Categories:	Metal; Nonferrous Metal; Nickel Alloy; Superalloy; Iron Base
Material Notes:	Inflection point 460°C. 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 forms are round, flats, tube, strip, and wire. Data provided by the manufacturer, Special Metals.
Key Words:	UNS K94800; ASTM F 30; DIN 17745; Werkstoff Nr. 1.3922, 1.3926, 1.3927; AFNOR NF A54-301
Vendors:	Visit metalmen for your metals needs. Products include special chemistry, tight tolerances, custom tempers, odd dimensions/forms, and small quantities. Phone 1-800-767-9494. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	8.20 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	520 MPa	Annealed prior to test
	470 MPa @Temperature 300 °C	Annealed prior to test
Tensile Strength, Yield	260 MPa @Strain 0.2 %	Annealed prior to test
	160 MPa @Strain 0.2 %, Temperature 300 °C	Annealed prior to test
Elongation at Break	42 %	Annealed prior to test.
	43 % @Temperature 300 °C	Annealed prior to test.

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000470 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	8.50 µm/m-°C @Temperature 20.0 - 100 °C
	8.30 - 9.30 µm/m-°C @Temperature 20.0 - 400 °C
Thermal Conductivity	16.7 W/m-K
Melting Point	1450 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.10 %
Carbon, C	<= 0.050 %
Chromium, Cr	<= 0.25 %
Cobalt, Co	<= 1.0 %
Iron, Fe	49 %	As remainder
Manganese, Mn	<= 0.80 %
Nickel, Ni	48 %	nominal; adjustable to meet expansion requirements
Phosphorus, P	<= 0.025 %
Silicon, Si	<= 0.30 %
Sulfur, S	<= 0.025 %

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NIND22 / 17526

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