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Chromium-Bearing Copper-Nickel, UNS C71900, Spring Temper
Categories: Metal; Nonferrous Metal; Copper Alloy

Material Notes: Applications: Heat exchanger tubes, tube sheets, water boxes, ferrules, saltwater pipe

Test specimen: strip.

Key Words: Cupronickel with Chromium
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 8.94 g/cc0.323 lb/in³C71500
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 101101
Tensile Strength, Ultimate 835 MPa121000 psi
Tensile Strength, Yield 800 MPa
@Strain 0.2 %
116000 psi
@Strain 0.2 %
Elongation at Break 6.0 %6.0 %In 50 mm
Modulus of Elasticity 150 GPa21800 ksi
Poissons Ratio 0.2710.271
Machinability 20 %20 %Based on Free cutting brass = 100%
Shear Modulus 59.0 GPa8560 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.0000395 ohm-cm
@Temperature 20.0 °C
0.0000395 ohm-cm
@Temperature 68.0 °F
Magnetic Permeability 1.00031.0003
 
Thermal PropertiesMetricEnglishComments
CTE, linear  16.8 µm/m-°C
@Temperature 20.0 - 200 °C
9.33 µin/in-°F
@Temperature 68.0 - 392 °F
 17.1 µm/m-°C
@Temperature 20.0 - 300 °C
9.50 µin/in-°F
@Temperature 68.0 - 572 °F
Thermal Conductivity 29.0 W/m-K201 BTU-in/hr-ft²-°F
 29.2 W/m-K
@Temperature 100 °C
203 BTU-in/hr-ft²-°F
@Temperature 212 °F
Mill Annealed (C71500)
 34.1 W/m-K
@Temperature 200 °C
237 BTU-in/hr-ft²-°F
@Temperature 392 °F
Mill Annealed (C71500)
 38.6 W/m-K
@Temperature 300 °C
268 BTU-in/hr-ft²-°F
@Temperature 572 °F
Mill Annealed (C71500)
 43.1 W/m-K
@Temperature 400 °C
299 BTU-in/hr-ft²-°F
@Temperature 752 °F
Mill Annealed (C71500)
 48.1 W/m-K
@Temperature 500 °C
334 BTU-in/hr-ft²-°F
@Temperature 932 °F
Mill Annealed (C71500)
 53.1 W/m-K
@Temperature 600.0 °C
369 BTU-in/hr-ft²-°F
@Temperature 1112 °F
Mill Annealed (C71500)
 58.1 W/m-K
@Temperature 700.0 °C
403 BTU-in/hr-ft²-°F
@Temperature 1292 °F
Mill Annealed (C71500)
Melting Point 1170 - 1220 °C2140 - 2230 °F
Solidus 1170 °C2140 °F
Liquidus 1220 °C2230 °F
 
Processing PropertiesMetricEnglishComments
Hot-Working Temperature 900 - 1065 °C1650 - 1949 °F
 
Component Elements PropertiesMetricEnglishComments
Beryllium, Be 0.50 %0.50 %
Copper, Cu 67.8 %67.8 %
Iron, Fe 0.70 %0.70 %
Nickel, Ni 31 %31 %

References for this datasheet.

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MC71900b4 / 11761

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