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ASTM B596 Au-Cu vs. C70600 Copper-nickel

ASTM B596 Au-Cu belongs to the otherwise unclassified metals classification, while C70600 copper-nickel belongs to the copper alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ASTM B596 Au-Cu and the bottom bar is C70600 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
120
Elongation at Break, % 4.3 to 17
3.0 to 34
Poisson's Ratio 0.41
0.34
Shear Modulus, GPa 36
46
Shear Strength, MPa 280 to 360
190 to 330
Tensile Strength: Ultimate (UTS), MPa 450 to 620
290 to 570

Thermal Properties

Latent Heat of Fusion, J/g 77
220
Melting Completion (Liquidus), °C 1060
1150
Melting Onset (Solidus), °C 930
1100
Specific Heat Capacity, J/kg-K 150
390
Thermal Expansion, µm/m-K 14
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
9.9

Otherwise Unclassified Properties

Density, g/cm3 18
8.9

Common Calculations

Stiffness to Weight: Axial, points 3.1
7.7
Stiffness to Weight: Bending, points 8.5
19
Strength to Weight: Axial, points 6.8 to 9.4
9.1 to 18
Strength to Weight: Bending, points 7.1 to 8.8
11 to 17
Thermal Shock Resistance, points 22 to 30
9.8 to 19

Alloy Composition

Copper (Cu), % 9.0 to 11
84.7 to 90
Gold (Au), % 89 to 91
0
Iron (Fe), % 0
1.0 to 1.8
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
9.0 to 11
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5