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ASTM B477 Au-Ni-Ag vs. Grade 33 Titanium

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while grade 33 titanium belongs to the titanium alloys. There are 19 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 grade 33 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
110
Elongation at Break, % 5.5 to 11
23
Poisson's Ratio 0.41
0.32
Shear Modulus, GPa 34
41
Shear Strength, MPa 190 to 320
240
Tensile Strength: Ultimate (UTS), MPa 310 to 550
390

Thermal Properties

Latent Heat of Fusion, J/g 80
420
Melting Completion (Liquidus), °C 1010
1660
Melting Onset (Solidus), °C 930
1610
Specific Heat Capacity, J/kg-K 160
540
Thermal Expansion, µm/m-K 15
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
6.9

Otherwise Unclassified Properties

Density, g/cm3 17
4.5

Common Calculations

Stiffness to Weight: Axial, points 3.1
13
Stiffness to Weight: Bending, points 8.9
35
Strength to Weight: Axial, points 5.0 to 9.0
24
Strength to Weight: Bending, points 6.0 to 8.8
26
Thermal Shock Resistance, points 16 to 28
30

Alloy Composition

Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
0.1 to 0.2
Gold (Au), % 74.2 to 75.8
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.3
Nickel (Ni), % 2.6 to 3.4
0.35 to 0.55
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.010 to 0.020
Ruthenium (Ru), % 0
0.020 to 0.040
Silver (Ag), % 21.4 to 22.6
0
Titanium (Ti), % 0
98.1 to 99.52
Residuals, % 0
0 to 0.4