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ASTM B477 Au-Ni-Ag vs. C46200 Brass

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C46200 brass belongs to the copper alloys. There are 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ASTM B477 Au-Ni-Ag and the bottom bar is C46200 brass.

ASTM B477 Gold-Nickel-Silver Electrical Contact AlloyUNS C46200 Naval Brass
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
100
Elongation at Break, % 5.5 to 11
17 to 34
Poisson's Ratio 0.41
0.31
Shear Modulus, GPa 34
40
Shear Strength, MPa 190 to 320
240 to 290
Tensile Strength: Ultimate (UTS), MPa 310 to 550
370 to 480

Thermal Properties

Latent Heat of Fusion, J/g 80
170
Melting Completion (Liquidus), °C 1010
840
Melting Onset (Solidus), °C 930
800
Specific Heat Capacity, J/kg-K 160
380
Thermal Expansion, µm/m-K 15
20

Otherwise Unclassified Properties

Density, g/cm3 17
8.1

Common Calculations

Stiffness to Weight: Axial, points 3.1
7.2
Stiffness to Weight: Bending, points 8.9
19
Strength to Weight: Axial, points 5.0 to 9.0
13 to 16
Strength to Weight: Bending, points 6.0 to 8.8
14 to 17
Thermal Shock Resistance, points 16 to 28
12 to 16

Alloy Composition

Copper (Cu), % 0
62 to 65
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.2
Nickel (Ni), % 2.6 to 3.4
0
Silver (Ag), % 21.4 to 22.6
0
Tin (Sn), % 0
0.5 to 1.0
Zinc (Zn), % 0
33.3 to 37.5
Residuals, % 0
0 to 0.4