C40500 Penny Bronze vs. ASTM B628 Ag-Cu

C40500 penny bronze belongs to the copper alloys classification, while ASTM B628 Ag-Cu belongs to the otherwise unclassified metals. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is C40500 penny bronze and the bottom bar is ASTM B628 Ag-Cu.

UNS C40500 Penny Bronze ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		83

Elongation at Break, %		3.0 to 49
Elongation at Break, %		1.1 to 17

Poisson's Ratio		0.34
Poisson's Ratio		0.36

Shear Modulus, GPa		43
Shear Modulus, GPa		31

Shear Strength, MPa		210 to 310
Shear Strength, MPa		210 to 430

Tensile Strength: Ultimate (UTS), MPa		270 to 540
Tensile Strength: Ultimate (UTS), MPa		350 to 760

Thermal Properties

Latent Heat of Fusion, J/g		200
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		1060
Melting Completion (Liquidus), °C		780

Melting Onset (Solidus), °C		1020
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		280

Thermal Expansion, µm/m-K		18
Thermal Expansion, µm/m-K		19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		41
Electrical Conductivity: Equal Volume, % IACS		84

Electrical Conductivity: Equal Weight (Specific), % IACS		42
Electrical Conductivity: Equal Weight (Specific), % IACS		75

Otherwise Unclassified Properties

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

Common Calculations

Stiffness to Weight: Axial, points		7.2
Stiffness to Weight: Axial, points		4.6

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

Strength to Weight: Axial, points		8.5 to 17
Strength to Weight: Axial, points		9.5 to 21

Strength to Weight: Bending, points		10 to 17
Strength to Weight: Bending, points		11 to 18

Thermal Shock Resistance, points		9.5 to 19
Thermal Shock Resistance, points		16 to 34

Alloy Composition

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

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

Copper (Cu), %		94 to 96
Copper (Cu), %		26.6 to 29

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

Lead (Pb), %		0 to 0.050
Lead (Pb), %		0 to 0.030

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

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.030

Silver (Ag), %		0
Silver (Ag), %		71 to 73

Tin (Sn), %		0.7 to 1.3
Tin (Sn), %		0

Zinc (Zn), %		2.1 to 5.3
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.21