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ASTM B617 Coin Silver vs. 6018 Aluminum

ASTM B617 coin silver belongs to the otherwise unclassified metals classification, while 6018 aluminum belongs to the aluminum alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, 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 6018 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
69
Elongation at Break, % 1.1 to 22
9.0 to 9.1
Poisson's Ratio 0.37
0.33
Shear Modulus, GPa 28
26
Shear Strength, MPa 180 to 290
170 to 180
Tensile Strength: Ultimate (UTS), MPa 290 to 520
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 120
400
Melting Completion (Liquidus), °C 870
640
Melting Onset (Solidus), °C 780
570
Specific Heat Capacity, J/kg-K 250
890
Thermal Expansion, µm/m-K 19
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 83
44
Electrical Conductivity: Equal Weight (Specific), % IACS 72
140

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
48
Strength to Weight: Axial, points 7.7 to 14
28 to 29
Strength to Weight: Bending, points 9.3 to 14
34 to 35
Thermal Shock Resistance, points 14 to 25
13

Alloy Composition

Aluminum (Al), % 0 to 0.0050
93.1 to 97.8
Bismuth (Bi), % 0
0.4 to 0.7
Cadmium (Cd), % 0 to 0.050
0
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 9.0 to 10.4
0.15 to 0.4
Iron (Fe), % 0 to 0.050
0 to 0.7
Lead (Pb), % 0 to 0.030
0.4 to 1.2
Magnesium (Mg), % 0
0.6 to 1.2
Manganese (Mn), % 0
0.3 to 0.8
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0
0.5 to 1.2
Silver (Ag), % 89.6 to 91
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0 to 0.060
0 to 0.3
Residuals, % 0
0 to 0.15