C82700 Copper vs. ASTM B617 Coin Silver

C82700 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 C82700 copper and the bottom bar is ASTM B617 coin silver.

UNS C82700 Beryllium-Nickel 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, %		1.8
Elongation at Break, %		1.1 to 22

Poisson's Ratio		0.33
Poisson's Ratio		0.37

Shear Modulus, GPa		46
Shear Modulus, GPa		28

Tensile Strength: Ultimate (UTS), MPa		1200
Tensile Strength: Ultimate (UTS), MPa		290 to 520

Thermal Properties

Latent Heat of Fusion, J/g		240
Latent Heat of Fusion, J/g		120

Melting Completion (Liquidus), °C		950
Melting Completion (Liquidus), °C		870

Melting Onset (Solidus), °C		860
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		380
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		20
Electrical Conductivity: Equal Volume, % IACS		83

Electrical Conductivity: Equal Weight (Specific), % IACS		21
Electrical Conductivity: Equal Weight (Specific), % IACS		72

Otherwise Unclassified Properties

Density, g/cm³		8.7
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		7.8
Stiffness to Weight: Axial, points		4.1

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		38
Strength to Weight: Axial, points		7.7 to 14

Strength to Weight: Bending, points		29
Strength to Weight: Bending, points		9.3 to 14

Thermal Shock Resistance, points		41
Thermal Shock Resistance, points		14 to 25

Alloy Composition

Aluminum (Al), %		0 to 0.15
Aluminum (Al), %		0 to 0.0050

Beryllium (Be), %		2.4 to 2.6
Beryllium (Be), %		0

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

Chromium (Cr), %		0 to 0.090
Chromium (Cr), %		0

Copper (Cu), %		94.6 to 96.7
Copper (Cu), %		9.0 to 10.4

Iron (Fe), %		0 to 0.25
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0 to 0.020
Lead (Pb), %		0 to 0.030

Nickel (Ni), %		1.0 to 1.5
Nickel (Ni), %		0 to 0.010

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

Silicon (Si), %		0 to 0.15
Silicon (Si), %		0

Silver (Ag), %		0
Silver (Ag), %		89.6 to 91

Tin (Sn), %		0 to 0.1
Tin (Sn), %		0

Zinc (Zn), %		0 to 0.1
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.060