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ASTM B477 Au-Ni-Ag vs. C95700 Bronze

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C95700 bronze belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (12, 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 C95700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
130
Elongation at Break, % 5.5 to 11
23
Poisson's Ratio 0.41
0.34
Shear Modulus, GPa 34
47
Tensile Strength: Ultimate (UTS), MPa 310 to 550
680

Thermal Properties

Latent Heat of Fusion, J/g 80
230
Melting Completion (Liquidus), °C 1010
990
Melting Onset (Solidus), °C 930
950
Specific Heat Capacity, J/kg-K 160
440
Thermal Expansion, µm/m-K 15
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
3.3

Otherwise Unclassified Properties

Density, g/cm3 17
8.2

Common Calculations

Stiffness to Weight: Axial, points 3.1
8.5
Stiffness to Weight: Bending, points 8.9
20
Strength to Weight: Axial, points 5.0 to 9.0
23
Strength to Weight: Bending, points 6.0 to 8.8
21
Thermal Shock Resistance, points 16 to 28
21

Alloy Composition

Aluminum (Al), % 0
7.0 to 8.5
Copper (Cu), % 0
71 to 78.5
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
2.0 to 4.0
Lead (Pb), % 0
0 to 0.030
Manganese (Mn), % 0
11 to 14
Nickel (Ni), % 2.6 to 3.4
1.5 to 3.0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 21.4 to 22.6
0
Residuals, % 0
0 to 0.5