ASTM B477 Au-Ni-Ag vs. EN 2.4964 Cobalt

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while EN 2.4964 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (11, 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 EN 2.4964 cobalt.

ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy EN 2.4964 (CoCr20W15Ni) Cobalt Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		95
Elastic (Young's, Tensile) Modulus, GPa		220

Elongation at Break, %		5.5 to 11
Elongation at Break, %		40

Poisson's Ratio		0.41
Poisson's Ratio		0.29

Shear Modulus, GPa		34
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		310 to 550
Tensile Strength: Ultimate (UTS), MPa		960

Thermal Properties

Latent Heat of Fusion, J/g		80
Latent Heat of Fusion, J/g		290

Melting Completion (Liquidus), °C		1010
Melting Completion (Liquidus), °C		1630

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		1550

Specific Heat Capacity, J/kg-K		160
Specific Heat Capacity, J/kg-K		400

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		14
Electrical Conductivity: Equal Volume, % IACS		1.9

Electrical Conductivity: Equal Weight (Specific), % IACS		7.5
Electrical Conductivity: Equal Weight (Specific), % IACS		1.8

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		9.6

Common Calculations

Stiffness to Weight: Axial, points		3.1
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		8.9
Stiffness to Weight: Bending, points		21

Strength to Weight: Axial, points		5.0 to 9.0
Strength to Weight: Axial, points		28

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		25

Alloy Composition

Carbon (C), %		0
Carbon (C), %		0.050 to 0.15

Chromium (Cr), %		0
Chromium (Cr), %		19 to 21

Cobalt (Co), %		0
Cobalt (Co), %		46.4 to 58

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

Iron (Fe), %		0
Iron (Fe), %		0 to 3.0

Manganese (Mn), %		0
Manganese (Mn), %		0 to 2.0

Nickel (Ni), %		2.6 to 3.4
Nickel (Ni), %		9.0 to 11

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.020

Silicon (Si), %		0
Silicon (Si), %		0 to 0.4

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

Sulfur (S), %		0
Sulfur (S), %		0 to 0.015

Tungsten (W), %		0
Tungsten (W), %		14 to 16

Residuals, %		0 to 0.3
Residuals, %		0