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ASTM B477 Au-Ni-Ag vs. AISI 304 Stainless Steel

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while AISI 304 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (16, 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 AISI 304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
200
Elongation at Break, % 5.5 to 11
8.0 to 43
Poisson's Ratio 0.41
0.28
Shear Modulus, GPa 34
77
Shear Strength, MPa 190 to 320
400 to 690
Tensile Strength: Ultimate (UTS), MPa 310 to 550
580 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 80
290
Melting Completion (Liquidus), °C 1010
1450
Melting Onset (Solidus), °C 930
1400
Specific Heat Capacity, J/kg-K 160
480
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
2.7

Otherwise Unclassified Properties

Density, g/cm3 17
7.8

Common Calculations

Stiffness to Weight: Axial, points 3.1
14
Stiffness to Weight: Bending, points 8.9
25
Strength to Weight: Axial, points 5.0 to 9.0
21 to 42
Strength to Weight: Bending, points 6.0 to 8.8
20 to 32
Thermal Shock Resistance, points 16 to 28
12 to 25

Alloy Composition

Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
18 to 20
Gold (Au), % 74.2 to 75.8
0
Iron (Fe), % 0
66.5 to 74
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 2.6 to 3.4
8.0 to 10.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Silver (Ag), % 21.4 to 22.6
0
Sulfur (S), % 0
0 to 0.030
Residuals, % 0 to 0.3
0