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Tin-Bearing Copper Nickel, UNS C72500, Annealed flat products
Categories: Metal; Nonferrous Metal; Copper Alloy

Material Notes: Excellent corrosion resistance. Excellent hot and cold formability. Fabricated by blanking, brazing, coining, drawing, etching, forming and bending, heading and upsetting, roll threading and knurling, shearing, spinning, squeezing, stamping and swaging.

Applications: relay and switch springs, connectors, brazing alloy, lead frames, control and sensing bellows.

Test specimen: flat products - 1mm thickness, 0.015mm grain size.

Key Words: Cupronickel with Tin
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Physical PropertiesOriginal ValueComments
Density 8.89 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell B 42
Tensile Strength, Ultimate 380 MPa
Tensile Strength, Yield 150 MPa
@Strain 0.2 %
 150 MPa
@Strain 0.5 %
Elongation at Break 35 %In 50 mm
Modulus of Elasticity 137 GPa
Poissons Ratio 0.32Calculated
Machinability 20 %UNS C36000 (free-cutting brass) = 100%
Shear Modulus 52.0 GPa
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000157 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 16.5 µm/m-°C
@Temperature 20.0 - 300 °C
Specific Heat Capacity 0.0900 BTU/lb-°F
Thermal Conductivity 55.0 W/m-K
@Temperature 20.0 °C
Melting Point 1060 - 1130 °C
Solidus 1060 °C
Liquidus 1130 °C
Annealing Point 1200 - 1475 °F
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 650 - 800 °C
Hot-Working Temperature 850 - 950 °C
 
Component Elements PropertiesOriginal ValueComments
Copper, Cu 88.2 %
Iron, Fe <= 0.60 %
Lead, Pb <= 0.050 %
Manganese, Mn <= 0.20 %
Nickel, Ni 8.5 - 10.5 %
Other, total <= 0.20 %
Tin, Sn 1.8 - 2.8 %
Zinc, Zn <= 0.50 %

References for this datasheet.

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MC72500b2 / 11763

Specialty Compounds RTP Company

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