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Rulon Bearings

Cupronickel 75-25, UNS C71300 Copper Coinage Alloy
Categories: Metal; Nonferrous Metal; Copper Alloy

Material Notes: This alloy is used primarily in coins. The hard rolled alloy creates clean blanks and the annealed alloy allows a good rendition of the coins features.

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Physical PropertiesMetricEnglishComments
Density 8.94 g/cc0.323 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 6969Hard Drawn (H80 - for Tubing) or Rolled (H04 for Flat Products)
Tensile Strength, Ultimate 359 MPa52000 psiAnnealed
 538 MPa78000 psiHard Drawn (H80 - for Tubing) or Rolled (H04 for Flat Products)
Tensile Strength, Yield 103 MPa15000 psiAnnealed
Elongation at Break 11 %11 %Hard Drawn (H80 - for Tubing) or Rolled (H04 for Flat Products)
 40 %40 %Annealed
Tensile Modulus 152 GPa22000 ksi(C71500 Annealed)
Poissons Ratio 0.3250.325(C71500 Annealed)
Machinability 20 %20 %Based on Free cutting brass = 100%
Shear Modulus 57.2 GPa8300 ksi(C71500 Annealed)
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000287 ohm-cm0.0000287 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear 16.2 µm/m-°C
@Temperature 20.0 - 300 °C
9.00 µin/in-°F
@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.377 J/g-°C0.0900 BTU/lb-°F
Thermal Conductivity 32.9 W/m-K228 BTU-in/hr-ft²-°F
Melting Point 1160 - 1230 °C2120 - 2240 °F
Solidus 1160 °C2120 °F
Liquidus 1230 °C2240 °F
 
Component Elements PropertiesMetricEnglishComments
Copper, Cu 71.25 - 76.5 %71.25 - 76.5 %As Remainder
Iron, Fe <= 0.20 %<= 0.20 %
Lead, Pb <= 0.050 %<= 0.050 %
Manganese, Mn <= 1.0 %<= 1.0 %
Nickel, Ni 23.5 - 26.5 %23.5 - 26.5 %
Zinc, Zn <= 1.0 %<= 1.0 %

References for this datasheet.

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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MC71300b1 / 11743

Aluminum Castings

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