Copper nickel 20%, UNS C71000

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Copper nickel 20%, UNS C71000
Categories:	Metal; Nonferrous Metal; Copper Alloy
Material Notes:	Excellent corrosion resistance. Good hot and cold formability. Fabricated by forming and bending, welding. Applications: communication relays, condensers, condenser plates, electrical springs, evaporator and heat exchanger tubes, ferrules, resistors. Available as flat products, wire, and tube.
Key Words:	CDA 710 (80/20); 80-20 Cupronickel
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Physical Properties	Metric	English	Comments

Density	8.94 g/cc	0.323 lb/in³

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	338 - 655 MPa	49000 - 95000 psi
Tensile Strength, Yield	90.0 - 586 MPa	13100 - 85000 psi	Depending on temper
Elongation at Break	40 %	40 %	in 76.2 mm.
Modulus of Elasticity	140 GPa	20300 ksi
	140 GPa	20300 ksi
Poissons Ratio	0.35	0.35	Calculated
Machinability	20 %	20 %	UNS C36000 (free-cutting brass) = 100%
Shear Modulus	52.0 GPa	7540 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000190 ohm-cm @Temperature 20.0 °C	0.0000190 ohm-cm @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
CTE, linear	16.4 µm/m-°C @Temperature 20.0 - 300 °C	9.11 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.380 J/g-°C	0.0908 BTU/lb-°F
Thermal Conductivity	36.0 W/m-K	250 BTU-in/hr-ft²-°F
	36.0 W/m-K @Temperature 20.0 °C	250 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	1150 - 1200 °C	2100 - 2190 °F
Solidus	1150 °C	2100 °F
Liquidus	1200 °C	2190 °F
Annealing Point	649 - 816 °C	1200 - 1500 °F

Processing Properties	Metric	English	Comments
Annealing Temperature	600 - 825 °C	1110 - 1520 °F
Hot-Working Temperature	850 - 950 °C	1560 - 1740 °F

Component Elements Properties	Metric	English	Comments
Copper, Cu	79 %	79 %
Iron, Fe	<= 1.0 %	<= 1.0 %
Lead, Pb	<= 0.050 %	<= 0.050 %
Manganese, Mn	<= 1.0 %	<= 1.0 %
Nickel, Ni	19 - 23 %	19 - 23 %
Other, total	<= 0.50 %	<= 0.50 %
Zinc, Zn	<= 1.0 %	<= 1.0 %

References for this datasheet.

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MC71000b1 / 11730

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