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ASTM B477 Au-Ni-Ag vs. C71640 Copper-nickel

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C71640 copper-nickel belongs to the copper alloys. There are 17 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM B477 Au-Ni-Ag and the bottom bar is C71640 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
140
Poisson's Ratio 0.41
0.33
Shear Modulus, GPa 34
52
Tensile Strength: Ultimate (UTS), MPa 310 to 550
490 to 630

Thermal Properties

Latent Heat of Fusion, J/g 80
240
Melting Completion (Liquidus), °C 1010
1180
Melting Onset (Solidus), °C 930
1120
Specific Heat Capacity, J/kg-K 160
410
Thermal Expansion, µm/m-K 15
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
7.1

Otherwise Unclassified Properties

Density, g/cm3 17
8.9

Common Calculations

Stiffness to Weight: Axial, points 3.1
8.7
Stiffness to Weight: Bending, points 8.9
20
Strength to Weight: Axial, points 5.0 to 9.0
15 to 20
Strength to Weight: Bending, points 6.0 to 8.8
16 to 18
Thermal Shock Resistance, points 16 to 28
16 to 21

Alloy Composition

Copper (Cu), % 0
61.7 to 67.8
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
1.7 to 2.3
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0
1.5 to 2.5
Nickel (Ni), % 2.6 to 3.4
29 to 32
Silver (Ag), % 21.4 to 22.6
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5