C99300 Copper vs. ASTM B628 Ag-Cu

C99300 copper 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 18 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 C99300 copper and the bottom bar is ASTM B628 Ag-Cu.

UNS C99300 Nickel-Aluminum Copper ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		2.0
Elongation at Break, %		1.1 to 17

Poisson's Ratio		0.33
Poisson's Ratio		0.36

Shear Modulus, GPa		46
Shear Modulus, GPa		31

Tensile Strength: Ultimate (UTS), MPa		660
Tensile Strength: Ultimate (UTS), MPa		350 to 760

Thermal Properties

Latent Heat of Fusion, J/g		240
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		1080
Melting Completion (Liquidus), °C		780

Melting Onset (Solidus), °C		1070
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		450
Specific Heat Capacity, J/kg-K		280

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		9.0
Electrical Conductivity: Equal Volume, % IACS		84

Electrical Conductivity: Equal Weight (Specific), % IACS		9.8
Electrical Conductivity: Equal Weight (Specific), % IACS		75

Otherwise Unclassified Properties

Density, g/cm³		8.2
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		8.3
Stiffness to Weight: Axial, points		4.6

Stiffness to Weight: Bending, points		20
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		9.5 to 21

Strength to Weight: Bending, points		20
Strength to Weight: Bending, points		11 to 18

Thermal Shock Resistance, points		22
Thermal Shock Resistance, points		16 to 34

Alloy Composition

Aluminum (Al), %		10.7 to 11.5
Aluminum (Al), %		0 to 0.0050

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

Cobalt (Co), %		1.0 to 2.0
Cobalt (Co), %		0

Copper (Cu), %		68.6 to 74.4
Copper (Cu), %		26.6 to 29

Iron (Fe), %		0.4 to 1.0
Iron (Fe), %		0 to 0.050

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

Nickel (Ni), %		13.5 to 16.5
Nickel (Ni), %		0 to 0.010

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

Silicon (Si), %		0 to 0.020
Silicon (Si), %		0

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

Tin (Sn), %		0 to 0.050
Tin (Sn), %		0

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

Residuals, %		0
Residuals, %		0 to 0.21