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2018 Aluminum vs. Grade 24 Titanium

2018 aluminum belongs to the aluminum alloys classification, while grade 24 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 2018 aluminum and the bottom bar is grade 24 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
110
Elongation at Break, % 9.6
11
Fatigue Strength, MPa 120
550
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
40
Shear Strength, MPa 270
610
Tensile Strength: Ultimate (UTS), MPa 420
1010
Tensile Strength: Yield (Proof), MPa 310
940

Thermal Properties

Latent Heat of Fusion, J/g 390
410
Maximum Temperature: Mechanical, °C 220
340
Melting Completion (Liquidus), °C 640
1610
Melting Onset (Solidus), °C 510
1560
Specific Heat Capacity, J/kg-K 870
560
Thermal Conductivity, W/m-K 150
7.1
Thermal Expansion, µm/m-K 22
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.0

Otherwise Unclassified Properties

Density, g/cm3 3.1
4.5
Embodied Carbon, kg CO2/kg material 8.1
43
Embodied Energy, MJ/kg 150
710
Embodied Water, L/kg 1130
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
110
Resilience: Unit (Modulus of Resilience), kJ/m3 670
4160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
35
Strength to Weight: Axial, points 38
63
Strength to Weight: Bending, points 41
50
Thermal Diffusivity, mm2/s 57
2.9
Thermal Shock Resistance, points 19
72

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
5.5 to 6.8
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 1.0
0 to 0.4
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0 to 0.9
0
Titanium (Ti), % 0
87.5 to 91
Vanadium (V), % 0
3.5 to 4.5
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0 to 0.4