C17300 Copper vs. ASTM B617 Coin Silver

C17300 copper belongs to the copper alloys classification, while ASTM B617 coin silver belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C17300 copper and the bottom bar is ASTM B617 coin silver.

UNS C17300 (CW102C) Beryllium 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, %		3.0 to 23
Elongation at Break, %		1.1 to 22

Poisson's Ratio		0.33
Poisson's Ratio		0.37

Shear Modulus, GPa		45
Shear Modulus, GPa		28

Shear Strength, MPa		320 to 790
Shear Strength, MPa		180 to 290

Tensile Strength: Ultimate (UTS), MPa		500 to 1380
Tensile Strength: Ultimate (UTS), MPa		290 to 520

Thermal Properties

Latent Heat of Fusion, J/g		230
Latent Heat of Fusion, J/g		120

Melting Completion (Liquidus), °C		980
Melting Completion (Liquidus), °C		870

Melting Onset (Solidus), °C		870
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		22
Electrical Conductivity: Equal Volume, % IACS		83

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

Otherwise Unclassified Properties

Density, g/cm³		8.8
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		7.6
Stiffness to Weight: Axial, points		4.1

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

Strength to Weight: Axial, points		16 to 44
Strength to Weight: Axial, points		7.7 to 14

Strength to Weight: Bending, points		16 to 31
Strength to Weight: Bending, points		9.3 to 14

Thermal Shock Resistance, points		17 to 48
Thermal Shock Resistance, points		14 to 25

Alloy Composition

Aluminum (Al), %		0 to 0.2
Aluminum (Al), %		0 to 0.0050

Beryllium (Be), %		1.8 to 2.0
Beryllium (Be), %		0

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

Copper (Cu), %		95.5 to 97.8
Copper (Cu), %		9.0 to 10.4

Iron (Fe), %		0 to 0.4
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0.2 to 0.6
Lead (Pb), %		0 to 0.030

Nickel (Ni), %		0.2 to 0.6
Nickel (Ni), %		0 to 0.010

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

Silicon (Si), %		0 to 0.2
Silicon (Si), %		0

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

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

Residuals, %		0
Residuals, %		0 to 0.060