ASTM B477 Au-Ni-Ag vs. AWS ENiCu-7

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while AWS ENiCu-7 belongs to the nickel alloys. There are 18 material properties with values for both materials. Properties with values for just one material (8, 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 AWS ENiCu-7.

ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy AWS ENiCu-7 (W84190) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		95
Elastic (Young's, Tensile) Modulus, GPa		160

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

Poisson's Ratio		0.41
Poisson's Ratio		0.32

Shear Modulus, GPa		34
Shear Modulus, GPa		62

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

Thermal Properties

Latent Heat of Fusion, J/g		80
Latent Heat of Fusion, J/g		280

Melting Completion (Liquidus), °C		1010
Melting Completion (Liquidus), °C		1270

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		1230

Specific Heat Capacity, J/kg-K		160
Specific Heat Capacity, J/kg-K		430

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		14
Electrical Conductivity: Equal Volume, % IACS		3.3

Electrical Conductivity: Equal Weight (Specific), % IACS		7.5
Electrical Conductivity: Equal Weight (Specific), % IACS		3.3

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		10

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		17

Strength to Weight: Bending, points		6.0 to 8.8
Strength to Weight: Bending, points		17

Thermal Shock Resistance, points		16 to 28
Thermal Shock Resistance, points		18

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.75

Carbon (C), %		0
Carbon (C), %		0 to 0.1

Copper (Cu), %		0
Copper (Cu), %		20.6 to 38

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

Iron (Fe), %		0
Iron (Fe), %		0 to 2.5

Manganese (Mn), %		0
Manganese (Mn), %		0 to 4.0

Nickel (Ni), %		2.6 to 3.4
Nickel (Ni), %		62 to 69

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

Silicon (Si), %		0
Silicon (Si), %		0 to 1.5

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

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

Titanium (Ti), %		0
Titanium (Ti), %		0 to 1.0

Residuals, %		0
Residuals, %		0 to 0.5