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ASTM B477 Au-Ni-Ag vs. Zamak 5

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while Zamak 5 belongs to the zinc alloys. There are 20 material properties with values for both materials. Properties with values for just one material (15, 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 Zamak 5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
87
Elongation at Break, % 5.5 to 11
6.3
Knoop Hardness 100 to 190
120
Poisson's Ratio 0.41
0.25
Shear Modulus, GPa 34
33
Shear Strength, MPa 190 to 320
260
Tensile Strength: Ultimate (UTS), MPa 310 to 550
330

Thermal Properties

Latent Heat of Fusion, J/g 80
120
Melting Completion (Liquidus), °C 1010
390
Melting Onset (Solidus), °C 930
380
Specific Heat Capacity, J/kg-K 160
410
Thermal Expansion, µm/m-K 15
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
26
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
37

Otherwise Unclassified Properties

Density, g/cm3 17
6.4

Common Calculations

Stiffness to Weight: Axial, points 3.1
7.5
Stiffness to Weight: Bending, points 8.9
23
Strength to Weight: Axial, points 5.0 to 9.0
14
Strength to Weight: Bending, points 6.0 to 8.8
16
Thermal Shock Resistance, points 16 to 28
9.9

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Copper (Cu), % 0
0.7 to 1.3
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.025 to 0.080
Nickel (Ni), % 2.6 to 3.4
0 to 0.020
Silicon (Si), % 0
0 to 0.030
Silver (Ag), % 21.4 to 22.6
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
94.3 to 95.7
Residuals, % 0 to 0.3
0