ASTM B477 Au-Ni-Ag vs. C12900 Copper

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

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

Metric UnitsUS Customary Units

Mechanical Properties

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

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

Poisson's Ratio		0.41
Poisson's Ratio		0.34

Shear Modulus, GPa		34
Shear Modulus, GPa		43

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

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

Thermal Properties

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

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

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

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

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

Electrical Properties

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

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

Otherwise Unclassified Properties

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

Common Calculations

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

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

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

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

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

Alloy Composition

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

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

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

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

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

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

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

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

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

Residuals, %		0 to 0.3
Residuals, %		0