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ASTM B617 Coin Silver vs. 2618 Aluminum

ASTM B617 coin silver belongs to the otherwise unclassified metals classification, while 2618 aluminum belongs to the aluminum alloys. There are 19 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 B617 coin silver and the bottom bar is 2618 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
71
Elongation at Break, % 1.1 to 22
5.8
Poisson's Ratio 0.37
0.33
Shear Modulus, GPa 28
27
Shear Strength, MPa 180 to 290
260
Tensile Strength: Ultimate (UTS), MPa 290 to 520
420

Thermal Properties

Latent Heat of Fusion, J/g 120
390
Melting Completion (Liquidus), °C 870
640
Melting Onset (Solidus), °C 780
550
Specific Heat Capacity, J/kg-K 250
880
Thermal Expansion, µm/m-K 19
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 83
37
Electrical Conductivity: Equal Weight (Specific), % IACS 72
110

Otherwise Unclassified Properties

Density, g/cm3 10
2.9

Common Calculations

Stiffness to Weight: Axial, points 4.1
13
Stiffness to Weight: Bending, points 14
47
Strength to Weight: Axial, points 7.7 to 14
40
Strength to Weight: Bending, points 9.3 to 14
42
Thermal Shock Resistance, points 14 to 25
19

Alloy Composition

Aluminum (Al), % 0 to 0.0050
92.4 to 94.9
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 9.0 to 10.4
1.9 to 2.7
Iron (Fe), % 0 to 0.050
0.9 to 1.3
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0
1.3 to 1.8
Nickel (Ni), % 0 to 0.010
0.9 to 1.2
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0
0.1 to 0.25
Silver (Ag), % 89.6 to 91
0
Titanium (Ti), % 0
0.040 to 0.1
Zinc (Zn), % 0 to 0.060
0 to 0.1
Residuals, % 0
0 to 0.15