C12900 Copper vs. ASTM B477 Au-Ni-Ag

C12900 copper belongs to the copper alloys classification, while ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals. 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 C12900 copper and the bottom bar is ASTM B477 Au-Ni-Ag.

UNS C12900 Fire-Refined Silver-Bearing Tough Pitch Copper ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		95

Elongation at Break, %		2.8 to 50
Elongation at Break, %		5.5 to 11

Poisson's Ratio		0.34
Poisson's Ratio		0.41

Shear Modulus, GPa		43
Shear Modulus, GPa		34

Shear Strength, MPa		150 to 210
Shear Strength, MPa		190 to 320

Tensile Strength: Ultimate (UTS), MPa		220 to 420
Tensile Strength: Ultimate (UTS), MPa		310 to 550

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		80

Melting Completion (Liquidus), °C		1080
Melting Completion (Liquidus), °C		1010

Melting Onset (Solidus), °C		1030
Melting Onset (Solidus), °C		930

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		160

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		98
Electrical Conductivity: Equal Volume, % IACS		14

Electrical Conductivity: Equal Weight (Specific), % IACS		98
Electrical Conductivity: Equal Weight (Specific), % IACS		7.5

Otherwise Unclassified Properties

Density, g/cm³		9.0
Density, g/cm³		17

Common Calculations

Stiffness to Weight: Axial, points		7.2
Stiffness to Weight: Axial, points		3.1

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		8.9

Strength to Weight: Axial, points		6.8 to 13
Strength to Weight: Axial, points		5.0 to 9.0

Strength to Weight: Bending, points		9.1 to 14
Strength to Weight: Bending, points		6.0 to 8.8

Thermal Shock Resistance, points		7.8 to 15
Thermal Shock Resistance, points		16 to 28

Alloy Composition

Antimony (Sb), %		0 to 0.0030
Antimony (Sb), %		0

Arsenic (As), %		0 to 0.012
Arsenic (As), %		0

Bismuth (Bi), %		0 to 0.0030
Bismuth (Bi), %		0

Copper (Cu), %		99.88 to 100
Copper (Cu), %		0

Gold (Au), %		0
Gold (Au), %		74.2 to 75.8

Lead (Pb), %		0 to 0.0040
Lead (Pb), %		0

Nickel (Ni), %		0 to 0.050
Nickel (Ni), %		2.6 to 3.4

Silver (Ag), %		0 to 0.054
Silver (Ag), %		21.4 to 22.6

Tellurium (Te), %		0 to 0.025
Tellurium (Te), %		0

Residuals, %		0
Residuals, %		0 to 0.3