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ASTM B617 Coin Silver vs. Zamak 2

ASTM B617 coin silver belongs to the otherwise unclassified metals classification, while Zamak 2 belongs to the zinc alloys. There are 19 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is ASTM B617 coin silver and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
87
Elongation at Break, % 1.1 to 22
6.0
Poisson's Ratio 0.37
0.26
Shear Modulus, GPa 28
33
Shear Strength, MPa 180 to 290
320
Tensile Strength: Ultimate (UTS), MPa 290 to 520
360

Thermal Properties

Latent Heat of Fusion, J/g 120
130
Melting Completion (Liquidus), °C 870
390
Melting Onset (Solidus), °C 780
380
Specific Heat Capacity, J/kg-K 250
410
Thermal Expansion, µm/m-K 19
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 83
25
Electrical Conductivity: Equal Weight (Specific), % IACS 72
35

Otherwise Unclassified Properties

Density, g/cm3 10
6.5

Common Calculations

Stiffness to Weight: Axial, points 4.1
7.5
Stiffness to Weight: Bending, points 14
23
Strength to Weight: Axial, points 7.7 to 14
15
Strength to Weight: Bending, points 9.3 to 14
17
Thermal Shock Resistance, points 14 to 25
11

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
3.5 to 4.3
Cadmium (Cd), % 0 to 0.050
0 to 0.0050
Copper (Cu), % 9.0 to 10.4
2.5 to 3.3
Iron (Fe), % 0 to 0.050
0 to 0.1
Lead (Pb), % 0 to 0.030
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
Nickel (Ni), % 0 to 0.010
0 to 0.020
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0
0 to 0.030
Silver (Ag), % 89.6 to 91
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0 to 0.060
92.2 to 94
Residuals, % 0 to 0.060
0