ASTM B628 Ag-Cu vs. C66100 Bronze

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C66100 bronze belongs to the copper alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 17 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 ASTM B628 Ag-Cu and the bottom bar is C66100 bronze.

ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy UNS C66100 Leaded Silicon Bronze

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		83
Elastic (Young's, Tensile) Modulus, GPa		120

Elongation at Break, %		1.1 to 17
Elongation at Break, %		8.0 to 40

Poisson's Ratio		0.36
Poisson's Ratio		0.34

Shear Modulus, GPa		31
Shear Modulus, GPa		43

Shear Strength, MPa		210 to 430
Shear Strength, MPa		280 to 460

Tensile Strength: Ultimate (UTS), MPa		350 to 760
Tensile Strength: Ultimate (UTS), MPa		410 to 790

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		260

Melting Completion (Liquidus), °C		780
Melting Completion (Liquidus), °C		1050

Melting Onset (Solidus), °C		780
Melting Onset (Solidus), °C		1000

Specific Heat Capacity, J/kg-K		280
Specific Heat Capacity, J/kg-K		400

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

Otherwise Unclassified Properties

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

Common Calculations

Stiffness to Weight: Axial, points		4.6
Stiffness to Weight: Axial, points		7.4

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

Strength to Weight: Axial, points		9.5 to 21
Strength to Weight: Axial, points		13 to 25

Strength to Weight: Bending, points		11 to 18
Strength to Weight: Bending, points		14 to 22

Thermal Shock Resistance, points		16 to 34
Thermal Shock Resistance, points		15 to 29

Alloy Composition

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

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

Copper (Cu), %		26.6 to 29
Copper (Cu), %		92 to 97

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

Lead (Pb), %		0 to 0.030
Lead (Pb), %		0.2 to 0.8

Manganese (Mn), %		0
Manganese (Mn), %		0 to 1.5

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

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

Silicon (Si), %		0
Silicon (Si), %		2.8 to 3.5

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

Zinc (Zn), %		0 to 0.060
Zinc (Zn), %		0 to 1.5

Residuals, %		0
Residuals, %		0 to 0.5