ASTM B477 Au-Ni-Ag vs. C96900 Copper-nickel

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C96900 copper-nickel belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (10, 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 C96900 copper-nickel.

ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy UNS C96900 Copper-Nickel

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, %		4.5

Poisson's Ratio		0.41
Poisson's Ratio		0.34

Shear Modulus, GPa		34
Shear Modulus, GPa		45

Tensile Strength: Ultimate (UTS), MPa		310 to 550
Tensile Strength: Ultimate (UTS), MPa		850

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		1060

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		960

Specific Heat Capacity, J/kg-K		160
Specific Heat Capacity, J/kg-K		380

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		9.0

Electrical Conductivity: Equal Weight (Specific), % IACS		7.5
Electrical Conductivity: Equal Weight (Specific), % IACS		9.2

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.8

Common Calculations

Stiffness to Weight: Axial, points		3.1
Stiffness to Weight: Axial, points		7.7

Stiffness to Weight: Bending, points		8.9
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		5.0 to 9.0
Strength to Weight: Axial, points		27

Strength to Weight: Bending, points		6.0 to 8.8
Strength to Weight: Bending, points		23

Thermal Shock Resistance, points		16 to 28
Thermal Shock Resistance, points		30

Alloy Composition

Copper (Cu), %		0
Copper (Cu), %		73.6 to 78

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

Iron (Fe), %		0
Iron (Fe), %		0 to 0.5

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

Magnesium (Mg), %		0
Magnesium (Mg), %		0 to 0.15

Manganese (Mn), %		0
Manganese (Mn), %		0.050 to 0.3

Nickel (Ni), %		2.6 to 3.4
Nickel (Ni), %		14.5 to 15.5

Niobium (Nb), %		0
Niobium (Nb), %		0 to 0.1

Silicon (Si), %		0
Silicon (Si), %		0 to 0.3

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

Tin (Sn), %		0
Tin (Sn), %		7.5 to 8.5

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.5

Residuals, %		0
Residuals, %		0 to 0.5