ASTM B477 Au-Ni-Ag vs. C82700 Copper

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C82700 copper belongs to the copper alloys. 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 ASTM B477 Au-Ni-Ag and the bottom bar is C82700 copper.

ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy UNS C82700 Beryllium-Nickel 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, %		1.8

Poisson's Ratio		0.41
Poisson's Ratio		0.33

Shear Modulus, GPa		34
Shear Modulus, GPa		46

Tensile Strength: Ultimate (UTS), MPa		310 to 550
Tensile Strength: Ultimate (UTS), MPa		1200

Thermal Properties

Latent Heat of Fusion, J/g		80
Latent Heat of Fusion, J/g		240

Melting Completion (Liquidus), °C		1010
Melting Completion (Liquidus), °C		950

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		860

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		20

Electrical Conductivity: Equal Weight (Specific), % IACS		7.5
Electrical Conductivity: Equal Weight (Specific), % IACS		21

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.7

Common Calculations

Stiffness to Weight: Axial, points		3.1
Stiffness to Weight: Axial, points		7.8

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		38

Strength to Weight: Bending, points		6.0 to 8.8
Strength to Weight: Bending, points		29

Thermal Shock Resistance, points		16 to 28
Thermal Shock Resistance, points		41

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.15

Beryllium (Be), %		0
Beryllium (Be), %		2.4 to 2.6

Chromium (Cr), %		0
Chromium (Cr), %		0 to 0.090

Copper (Cu), %		0
Copper (Cu), %		94.6 to 96.7

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

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

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

Nickel (Ni), %		2.6 to 3.4
Nickel (Ni), %		1.0 to 1.5

Silicon (Si), %		0
Silicon (Si), %		0 to 0.15

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

Tin (Sn), %		0
Tin (Sn), %		0 to 0.1

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.1

Residuals, %		0
Residuals, %		0 to 0.5