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ASTM B477 Au-Ni-Ag vs. C90900 Bronze

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C90900 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.

For each property being compared, the top bar is ASTM B477 Au-Ni-Ag and the bottom bar is C90900 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
110
Elongation at Break, % 5.5 to 11
15
Poisson's Ratio 0.41
0.34
Shear Modulus, GPa 34
40
Tensile Strength: Ultimate (UTS), MPa 310 to 550
280

Thermal Properties

Latent Heat of Fusion, J/g 80
190
Melting Completion (Liquidus), °C 1010
980
Melting Onset (Solidus), °C 930
820
Specific Heat Capacity, J/kg-K 160
360
Thermal Expansion, µm/m-K 15
18

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 17
8.7

Common Calculations

Stiffness to Weight: Axial, points 3.1
6.8
Stiffness to Weight: Bending, points 8.9
18
Strength to Weight: Axial, points 5.0 to 9.0
8.8
Strength to Weight: Bending, points 6.0 to 8.8
11
Thermal Shock Resistance, points 16 to 28
10

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Copper (Cu), % 0
86 to 89
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
0 to 0.15
Lead (Pb), % 0
0 to 0.25
Nickel (Ni), % 2.6 to 3.4
0 to 0.5
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 21.4 to 22.6
0
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
12 to 14
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.6