ASTM B477 Au-Ni-Ag vs. ASTM B628 Ag-Cu

Both ASTM B477 Au-Ni-Ag and ASTM B628 Ag-Cu are otherwise unclassified metals. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (1, 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 ASTM B628 Ag-Cu.

ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		95
Elastic (Young's, Tensile) Modulus, GPa		83

Elongation at Break, %		5.5 to 11
Elongation at Break, %		1.1 to 17

Poisson's Ratio		0.41
Poisson's Ratio		0.36

Shear Modulus, GPa		34
Shear Modulus, GPa		31

Shear Strength, MPa		190 to 320
Shear Strength, MPa		210 to 430

Tensile Strength: Ultimate (UTS), MPa		310 to 550
Tensile Strength: Ultimate (UTS), MPa		350 to 760

Thermal Properties

Latent Heat of Fusion, J/g		80
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		1010
Melting Completion (Liquidus), °C		780

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		160
Specific Heat Capacity, J/kg-K		280

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		14
Electrical Conductivity: Equal Volume, % IACS		84

Electrical Conductivity: Equal Weight (Specific), % IACS		7.5
Electrical Conductivity: Equal Weight (Specific), % IACS		75

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		3.1
Stiffness to Weight: Axial, points		4.6

Stiffness to Weight: Bending, points		8.9
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		5.0 to 9.0
Strength to Weight: Axial, points		9.5 to 21

Strength to Weight: Bending, points		6.0 to 8.8
Strength to Weight: Bending, points		11 to 18

Thermal Shock Resistance, points		16 to 28
Thermal Shock Resistance, points		16 to 34

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.0050

Cadmium (Cd), %		0
Cadmium (Cd), %		0 to 0.050

Copper (Cu), %		0
Copper (Cu), %		26.6 to 29

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

Iron (Fe), %		0
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0
Lead (Pb), %		0 to 0.030

Nickel (Ni), %		2.6 to 3.4
Nickel (Ni), %		0 to 0.010

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.030

Silver (Ag), %		21.4 to 22.6
Silver (Ag), %		71 to 73

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.21