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C68700 Brass vs. ASTM B617 Coin Silver

C68700 brass belongs to the copper alloys classification, while ASTM B617 coin silver belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C68700 brass and the bottom bar is ASTM B617 coin silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
75
Poisson's Ratio 0.32
0.37
Shear Modulus, GPa 41
28
Tensile Strength: Ultimate (UTS), MPa 390
290 to 520

Thermal Properties

Latent Heat of Fusion, J/g 190
120
Melting Completion (Liquidus), °C 970
870
Melting Onset (Solidus), °C 930
780
Specific Heat Capacity, J/kg-K 400
250
Thermal Expansion, µm/m-K 19
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 23
83
Electrical Conductivity: Equal Weight (Specific), % IACS 25
72

Otherwise Unclassified Properties

Density, g/cm3 8.3
10

Common Calculations

Stiffness to Weight: Axial, points 7.3
4.1
Stiffness to Weight: Bending, points 19
14
Strength to Weight: Axial, points 13
7.7 to 14
Strength to Weight: Bending, points 14
9.3 to 14
Thermal Shock Resistance, points 13
14 to 25

Alloy Composition

Aluminum (Al), % 1.8 to 2.5
0 to 0.0050
Arsenic (As), % 0.020 to 0.1
0
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 76 to 79
9.0 to 10.4
Iron (Fe), % 0 to 0.060
0 to 0.050
Lead (Pb), % 0 to 0.070
0 to 0.030
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0
0 to 0.020
Silver (Ag), % 0
89.6 to 91
Zinc (Zn), % 17.8 to 22.2
0 to 0.060
Residuals, % 0
0 to 0.060