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ASTM B477 Au-Ni-Ag vs. AWS ERNiCrMo-3

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while AWS ERNiCrMo-3 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 ERNiCrMo-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
200
Elongation at Break, % 5.5 to 11
34
Poisson's Ratio 0.41
0.29
Shear Modulus, GPa 34
79
Tensile Strength: Ultimate (UTS), MPa 310 to 550
870

Thermal Properties

Latent Heat of Fusion, J/g 80
330
Melting Completion (Liquidus), °C 1010
1480
Melting Onset (Solidus), °C 930
1430
Specific Heat Capacity, J/kg-K 160
440
Thermal Expansion, µm/m-K 15
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
1.4

Otherwise Unclassified Properties

Density, g/cm3 17
8.6

Common Calculations

Stiffness to Weight: Axial, points 3.1
13
Stiffness to Weight: Bending, points 8.9
23
Strength to Weight: Axial, points 5.0 to 9.0
28
Strength to Weight: Bending, points 6.0 to 8.8
24
Thermal Shock Resistance, points 16 to 28
25

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0
0 to 0.5
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
0 to 5.0
Manganese (Mn), % 0
0 to 0.5
Molybdenum (Mo), % 0
8.0 to 10
Nickel (Ni), % 2.6 to 3.4
58 to 68.9
Niobium (Nb), % 0
3.2 to 4.2
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.5
Silver (Ag), % 21.4 to 22.6
0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0 to 0.4
Residuals, % 0
0 to 0.5