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ASTM B477 Au-Ni-Ag vs. AWS E100C-K3

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while AWS E100C-K3 belongs to the iron alloys. There are 18 material properties with values for both materials. Properties with values for just one material (11, 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 AWS E100C-K3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
190
Elongation at Break, % 5.5 to 11
18
Poisson's Ratio 0.41
0.29
Shear Modulus, GPa 34
73
Tensile Strength: Ultimate (UTS), MPa 310 to 550
770

Thermal Properties

Latent Heat of Fusion, J/g 80
250
Melting Completion (Liquidus), °C 1010
1460
Melting Onset (Solidus), °C 930
1410
Specific Heat Capacity, J/kg-K 160
470
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
9.0

Otherwise Unclassified Properties

Density, g/cm3 17
7.8

Common Calculations

Stiffness to Weight: Axial, points 3.1
13
Stiffness to Weight: Bending, points 8.9
24
Strength to Weight: Axial, points 5.0 to 9.0
27
Strength to Weight: Bending, points 6.0 to 8.8
24
Thermal Shock Resistance, points 16 to 28
23

Alloy Composition

Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0
0 to 0.35
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
92.6 to 98.5
Manganese (Mn), % 0
0.75 to 2.3
Molybdenum (Mo), % 0
0.25 to 0.65
Nickel (Ni), % 2.6 to 3.4
0.5 to 2.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.8
Silver (Ag), % 21.4 to 22.6
0
Sulfur (S), % 0
0 to 0.025
Vanadium (V), % 0
0 to 0.030
Residuals, % 0
0 to 0.5