CR012A Copper vs. ASTM B617 Coin Silver

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

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

Metric UnitsUS Customary Units

Mechanical Properties

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

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

Poisson's Ratio		0.34
Poisson's Ratio		0.37

Shear Modulus, GPa		43
Shear Modulus, GPa		28

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

Thermal Properties

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

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

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

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

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

Electrical Properties

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

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

Otherwise Unclassified Properties

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

Common Calculations

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

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

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

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

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

Alloy Composition

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

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

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

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

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

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

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

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

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

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

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

Residuals, %		0
Residuals, %		0 to 0.060