ASTM B477 Au-Ni-Ag vs. R30605 Cobalt

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while R30605 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (9, 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 R30605 cobalt.

ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy UNS R30605 (L605, Alloy 25, 2.4964) Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		95
Elastic (Young's, Tensile) Modulus, GPa		210

Elongation at Break, %		5.5 to 11
Elongation at Break, %		34

Poisson's Ratio		0.41
Poisson's Ratio		0.29

Shear Modulus, GPa		34
Shear Modulus, GPa		81

Tensile Strength: Ultimate (UTS), MPa		310 to 550
Tensile Strength: Ultimate (UTS), MPa		1130 to 1900

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		1410

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		1330

Specific Heat Capacity, J/kg-K		160
Specific Heat Capacity, J/kg-K		410

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		2.0

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		12

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		33 to 55

Strength to Weight: Bending, points		6.0 to 8.8
Strength to Weight: Bending, points		25 to 36

Thermal Shock Resistance, points		16 to 28
Thermal Shock Resistance, points		31 to 52

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 57

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

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

Manganese (Mn), %		0
Manganese (Mn), %		1.0 to 2.0

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

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.040

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 0.030

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

Residuals, %		0 to 0.3
Residuals, %		0