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ASTM B477 Au-Ni-Ag vs. C40500 Penny Bronze

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C40500 penny bronze belongs to the copper alloys. There are 19 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 C40500 penny bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
110
Elongation at Break, % 5.5 to 11
3.0 to 49
Poisson's Ratio 0.41
0.34
Shear Modulus, GPa 34
43
Shear Strength, MPa 190 to 320
210 to 310
Tensile Strength: Ultimate (UTS), MPa 310 to 550
270 to 540

Thermal Properties

Latent Heat of Fusion, J/g 80
200
Melting Completion (Liquidus), °C 1010
1060
Melting Onset (Solidus), °C 930
1020
Specific Heat Capacity, J/kg-K 160
380
Thermal Expansion, µm/m-K 15
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
41
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
42

Otherwise Unclassified Properties

Density, g/cm3 17
8.8

Common Calculations

Stiffness to Weight: Axial, points 3.1
7.2
Stiffness to Weight: Bending, points 8.9
18
Strength to Weight: Axial, points 5.0 to 9.0
8.5 to 17
Strength to Weight: Bending, points 6.0 to 8.8
10 to 17
Thermal Shock Resistance, points 16 to 28
9.5 to 19

Alloy Composition

Copper (Cu), % 0
94 to 96
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Nickel (Ni), % 2.6 to 3.4
0
Silver (Ag), % 21.4 to 22.6
0
Tin (Sn), % 0
0.7 to 1.3
Zinc (Zn), % 0
2.1 to 5.3
Residuals, % 0
0 to 0.5