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2024 Aluminum vs. ASTM B540 Palladium

2024 aluminum belongs to the aluminum alloys classification, while ASTM B540 palladium belongs to the otherwise unclassified metals. There are 23 material properties with values for both materials. Properties with values for just one material (9, 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 2024 aluminum and the bottom bar is ASTM B540 palladium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.0 to 16
1.1 to 14
Fatigue Strength, MPa 90 to 180
350
Poisson's Ratio 0.33
0.38
Shear Modulus, GPa 27
39
Shear Strength, MPa 130 to 320
500 to 700
Tensile Strength: Ultimate (UTS), MPa 200 to 540
830 to 1240
Tensile Strength: Yield (Proof), MPa 100 to 490
620 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 390
140
Melting Completion (Liquidus), °C 640
1220
Melting Onset (Solidus), °C 500
1020
Specific Heat Capacity, J/kg-K 880
240
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
4.9 to 5.5
Electrical Conductivity: Equal Weight (Specific), % IACS 90
3.5 to 3.9

Otherwise Unclassified Properties

Density, g/cm3 3.0
13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 68
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 70 to 1680
1790 to 4660
Stiffness to Weight: Axial, points 13
4.7
Stiffness to Weight: Bending, points 46
12
Strength to Weight: Axial, points 18 to 50
18 to 27
Strength to Weight: Bending, points 25 to 49
15 to 20
Thermal Shock Resistance, points 8.6 to 24
41 to 61

Alloy Composition

Aluminum (Al), % 90.7 to 94.7
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
13.5 to 14.5
Gold (Au), % 0
9.5 to 10.5
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0
Palladium (Pd), % 0
34 to 36
Platinum (Pt), % 0
9.5 to 10.5
Silicon (Si), % 0 to 0.5
0
Silver (Ag), % 0
29 to 31
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0.8 to 1.2
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0
0 to 0.3