ASTM B617 Coin Silver vs. CR012A Copper

ASTM B617 coin silver belongs to the otherwise unclassified metals classification, while CR012A copper belongs to the copper alloys. There are 18 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 ASTM B617 coin silver and the bottom bar is CR012A copper.

ASTM B617 Coin Silver Electrical Contact Alloy EN CR012A (CuAg0.07) Silver-Bearing Tough Pitch Copper

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		75
Elastic (Young's, Tensile) Modulus, GPa		120

Elongation at Break, %		1.1 to 22
Elongation at Break, %		15

Poisson's Ratio		0.37
Poisson's Ratio		0.34

Shear Modulus, GPa		28
Shear Modulus, GPa		43

Tensile Strength: Ultimate (UTS), MPa		290 to 520
Tensile Strength: Ultimate (UTS), MPa		220

Thermal Properties

Latent Heat of Fusion, J/g		120
Latent Heat of Fusion, J/g		210

Melting Completion (Liquidus), °C		870
Melting Completion (Liquidus), °C		1090

Melting Onset (Solidus), °C		780
Melting Onset (Solidus), °C		1040

Specific Heat Capacity, J/kg-K		250
Specific Heat Capacity, J/kg-K		390

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		83
Electrical Conductivity: Equal Volume, % IACS		100

Electrical Conductivity: Equal Weight (Specific), % IACS		72
Electrical Conductivity: Equal Weight (Specific), % IACS		100

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		9.0

Common Calculations

Stiffness to Weight: Axial, points		4.1
Stiffness to Weight: Axial, points		7.2

Stiffness to Weight: Bending, points		14
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		7.7 to 14
Strength to Weight: Axial, points		6.8

Strength to Weight: Bending, points		9.3 to 14
Strength to Weight: Bending, points		9.0

Thermal Shock Resistance, points		14 to 25
Thermal Shock Resistance, points		7.8

Alloy Composition

Aluminum (Al), %		0 to 0.0050
Aluminum (Al), %		0

Bismuth (Bi), %		0
Bismuth (Bi), %		0 to 0.00050

Cadmium (Cd), %		0 to 0.050
Cadmium (Cd), %		0

Copper (Cu), %		9.0 to 10.4
Copper (Cu), %		99.85 to 99.94

Iron (Fe), %		0 to 0.050
Iron (Fe), %		0

Lead (Pb), %		0 to 0.030
Lead (Pb), %		0

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		0

Oxygen (O), %		0
Oxygen (O), %		0 to 0.040

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0

Silver (Ag), %		89.6 to 91
Silver (Ag), %		0.060 to 0.080

Zinc (Zn), %		0 to 0.060
Zinc (Zn), %		0

Residuals, %		0 to 0.060
Residuals, %		0