Special Metals BRIGHTRAY® Alloy F Electrical Resistance Alloy

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Special Metals BRIGHTRAY® Alloy F Electrical Resistance Alloy (discontinued **)
Categories:	Metal; Electronic/Magnetic Alloy; Superalloy; Iron Base
Material Notes:	A nickel-iron-chromium electrical-resistance alloy for use at temperatures up to 1920°F (1050°C) under continuous operating conditions. Its high iron content and relatively low level of nickel make it particularly resistant to internal oxidation in atmospheres that alternate between oxidizing and reducing or carburizing. The alloy has a high temperature coefficient of resistance. Used for heating elements in industrial furnaces. Standard product forms are sheet and strip. Data provided by the manufacturer, Special Metals.
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Physical Properties	Original Value	Comments

Density	7.86 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	690 MPa	Annealed prior to test
	540 MPa @Temperature 550 °C	Annealed prior to test
Tensile Strength, Yield	370 MPa @Strain 0.2 %	Annealed prior to test
	270 MPa @Strain 0.2 %, Temperature 550 °C	Annealed prior to test

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000108 ohm-cm	Temperature coefficient of resistance is 290 µOhm/Ohm-°C in the range 25-500°C.
Magnetic Permeability	1.038	at 200 Oersted (15.9 kA/m)

Thermal Properties	Original Value	Comments
CTE, linear	15.0 µm/m-°C @Temperature 20.0 - 100 °C
Specific Heat Capacity	0.450 J/g-°C
Melting Point	1330 - 1400 °C
Solidus	1330 °C
Liquidus	1400 °C
Maximum Service Temperature, Air	1050 °C

Component Elements Properties	Original Value	Comments
Carbon, C	0.050 %
Chromium, Cr	18 %
Iron, Fe	42 %
Manganese, Mn	1.2 %
Nickel, Ni	37 %
Silicon, Si	2.3 %

**
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