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ASTM B617 Coin Silver vs. ACI-ASTM CB7Cu-2 Steel

ASTM B617 coin silver belongs to the otherwise unclassified metals classification, while ACI-ASTM CB7Cu-2 steel belongs to the iron alloys. There are 18 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B617 coin silver and the bottom bar is ACI-ASTM CB7Cu-2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
190
Elongation at Break, % 1.1 to 22
5.7 to 11
Poisson's Ratio 0.37
0.28
Shear Modulus, GPa 28
75
Tensile Strength: Ultimate (UTS), MPa 290 to 520
960 to 1350

Thermal Properties

Latent Heat of Fusion, J/g 120
280
Melting Completion (Liquidus), °C 870
1430
Melting Onset (Solidus), °C 780
1380
Specific Heat Capacity, J/kg-K 250
480
Thermal Expansion, µm/m-K 19
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 83
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 72
2.4

Otherwise Unclassified Properties

Density, g/cm3 10
7.8

Common Calculations

Stiffness to Weight: Axial, points 4.1
14
Stiffness to Weight: Bending, points 14
25
Strength to Weight: Axial, points 7.7 to 14
34 to 48
Strength to Weight: Bending, points 9.3 to 14
28 to 35
Thermal Shock Resistance, points 14 to 25
32 to 45

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
14 to 15.5
Copper (Cu), % 9.0 to 10.4
2.5 to 3.2
Iron (Fe), % 0 to 0.050
73.6 to 79
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0 to 0.7
Nickel (Ni), % 0 to 0.010
4.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 89.6 to 91
0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.060
0