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ASTM B477 Au-Ni-Ag vs. C95520 Bronze

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C95520 bronze belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (13, 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 B477 Au-Ni-Ag and the bottom bar is C95520 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
120
Elongation at Break, % 5.5 to 11
2.6
Poisson's Ratio 0.41
0.33
Shear Modulus, GPa 34
44
Tensile Strength: Ultimate (UTS), MPa 310 to 550
970

Thermal Properties

Latent Heat of Fusion, J/g 80
240
Melting Completion (Liquidus), °C 1010
1070
Melting Onset (Solidus), °C 930
1020
Specific Heat Capacity, J/kg-K 160
450
Thermal Expansion, µm/m-K 15
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
11
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
12

Otherwise Unclassified Properties

Density, g/cm3 17
8.2

Common Calculations

Stiffness to Weight: Axial, points 3.1
8.0
Stiffness to Weight: Bending, points 8.9
20
Strength to Weight: Axial, points 5.0 to 9.0
33
Strength to Weight: Bending, points 6.0 to 8.8
27
Thermal Shock Resistance, points 16 to 28
33

Alloy Composition

Aluminum (Al), % 0
10.5 to 11.5
Chromium (Cr), % 0
0 to 0.050
Cobalt (Co), % 0
0 to 0.2
Copper (Cu), % 0
74.5 to 81.3
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
4.0 to 5.5
Lead (Pb), % 0
0 to 0.030
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 2.6 to 3.4
4.2 to 6.0
Silicon (Si), % 0
0 to 0.15
Silver (Ag), % 21.4 to 22.6
0
Tin (Sn), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.5