Sandvik Cuprothal 49 and 49TC Resistance Wire

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Sandvik Cuprothal 49 and 49TC Resistance Wire
Categories:	Metal; Nonferrous Metal; Copper Alloy
Material Notes:	Cuprothal 49 is a Copper Nickel alloy, manufactured under close control from electrolytic Copper and pure Nickel. Its high electrical resistance, good ductility and non-corroding properties are very attractive for a variety of applications.In finer sizes its negligible temperature coefficient of resistance combined with its high resistivity makes it useful for the winding of precision resistors which must not change in resistance over a limited range in temperature. In this case the alloy is identified as Cuprothal 49 TC. Other applications are: temperature stable potentiometers, industrial rheostats and electric motor starter resistances. Information provided by Sandvik
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Physical Properties	Original Value	Comments

Density	8.90 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Vickers	130 @Thickness 1.00 mm
Tensile Strength, Ultimate	480 MPa @Thickness 1.00 mm
Tensile Strength, Yield	250 MPa @Strain 0.2 %, Thickness 1.00 mm
Elongation at Break	30 % @Thickness 1.00 mm

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000490 ohm-cm
	0.0000490 ohm-cm @Temperature 300 °C
	0.0000491 ohm-cm @Temperature 100 °C
	0.0000491 ohm-cm @Temperature 200 °C
	0.0000492 ohm-cm @Temperature 400 °C
	0.0000498 ohm-cm @Temperature 500 °C
	0.0000510 ohm-cm @Temperature 600 °C

Thermal Properties	Original Value	Comments
CTE, linear	14.0 µm/m-°C @Temperature 20.0 - 100 °C
Specific Heat Capacity	0.410 J/g-°C @Temperature 20.0 °C
Thermal Conductivity	21.0 W/m-K @Temperature 20.0 °C
Melting Point	1280 °C
Maximum Service Temperature, Air	600 °C

Component Elements Properties	Original Value	Comments
Copper, Cu	54.5 %
Iron, Fe	0.50 %
Manganese, Mn	1.0 %
Nickel, Ni	44 %

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