ASTM B477 Au-Ni-Ag vs. C92900 Bronze

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C92900 bronze belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (13, 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 C92900 bronze.

ASTM B477 Gold-Nickel-Silver Electrical Contact Alloy UNS C92900 Leaded Gear Bronze

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		95
Elastic (Young's, Tensile) Modulus, GPa		110

Elongation at Break, %		5.5 to 11
Elongation at Break, %		9.1

Poisson's Ratio		0.41
Poisson's Ratio		0.34

Shear Modulus, GPa		34
Shear Modulus, GPa		40

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

Thermal Properties

Latent Heat of Fusion, J/g		80
Latent Heat of Fusion, J/g		190

Melting Completion (Liquidus), °C		1010
Melting Completion (Liquidus), °C		1030

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

Specific Heat Capacity, J/kg-K		160
Specific Heat Capacity, J/kg-K		370

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		14
Electrical Conductivity: Equal Volume, % IACS		9.0

Electrical Conductivity: Equal Weight (Specific), % IACS		7.5
Electrical Conductivity: Equal Weight (Specific), % IACS		9.2

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.8

Common Calculations

Stiffness to Weight: Axial, points		3.1
Stiffness to Weight: Axial, points		6.8

Stiffness to Weight: Bending, points		8.9
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		5.0 to 9.0
Strength to Weight: Axial, points		11

Strength to Weight: Bending, points		6.0 to 8.8
Strength to Weight: Bending, points		13

Thermal Shock Resistance, points		16 to 28
Thermal Shock Resistance, points		13

Alloy Composition

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

Antimony (Sb), %		0
Antimony (Sb), %		0 to 0.25

Copper (Cu), %		0
Copper (Cu), %		82 to 86

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

Iron (Fe), %		0
Iron (Fe), %		0 to 0.2

Lead (Pb), %		0
Lead (Pb), %		2.0 to 3.2

Nickel (Ni), %		2.6 to 3.4
Nickel (Ni), %		2.8 to 4.0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 1.5

Silicon (Si), %		0
Silicon (Si), %		0 to 0.0050

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

Sulfur (S), %		0
Sulfur (S), %		0 to 0.050

Tin (Sn), %		0
Tin (Sn), %		9.0 to 11

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.25

Residuals, %		0
Residuals, %		0 to 0.7