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ASTM B541 Gold vs. 2025 Aluminum

ASTM B541 gold belongs to the otherwise unclassified metals classification, while 2025 aluminum belongs to the aluminum alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 B541 gold and the bottom bar is 2025 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
72
Elongation at Break, % 6.0 to 14
15
Poisson's Ratio 0.4
0.33
Shear Modulus, GPa 38
27
Shear Strength, MPa 410 to 690
240
Tensile Strength: Ultimate (UTS), MPa 670 to 1180
400
Tensile Strength: Yield (Proof), MPa 480 to 900
260

Thermal Properties

Latent Heat of Fusion, J/g 90
400
Melting Completion (Liquidus), °C 1110
640
Melting Onset (Solidus), °C 930
520
Specific Heat Capacity, J/kg-K 170
870
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7 to 12
40
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0 to 6.2
120

Otherwise Unclassified Properties

Density, g/cm3 17
3.0

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 91
55
Resilience: Unit (Modulus of Resilience), kJ/m3 1090 to 3830
450
Stiffness to Weight: Axial, points 3.4
13
Stiffness to Weight: Bending, points 9.0
46
Strength to Weight: Axial, points 11 to 19
37
Strength to Weight: Bending, points 9.8 to 14
40
Thermal Shock Resistance, points 36 to 63
18

Alloy Composition

Aluminum (Al), % 0
90.9 to 95.2
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 13.5 to 15.5
3.9 to 5.0
Gold (Au), % 70.5 to 72.5
0
Iron (Fe), % 0
0 to 1.0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0
0.4 to 1.2
Platinum (Pt), % 8.0 to 9.0
0
Silicon (Si), % 0
0.5 to 1.2
Silver (Ag), % 4.0 to 5.0
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0.7 to 1.3
0 to 0.25
Residuals, % 0
0 to 0.15