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Grade 24 Titanium vs. 8021 Aluminum

Grade 24 titanium belongs to the titanium alloys classification, while 8021 aluminum belongs to the aluminum alloys. There are 28 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 grade 24 titanium and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 11
2.3
Fatigue Strength, MPa 550
61
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
26
Tensile Strength: Ultimate (UTS), MPa 1010
160
Tensile Strength: Yield (Proof), MPa 940
130

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 340
170
Melting Completion (Liquidus), °C 1610
650
Melting Onset (Solidus), °C 1560
640
Specific Heat Capacity, J/kg-K 560
900
Thermal Conductivity, W/m-K 7.1
220
Thermal Expansion, µm/m-K 9.6
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
56
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
180

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.8
Embodied Carbon, kg CO2/kg material 43
8.1
Embodied Energy, MJ/kg 710
150
Embodied Water, L/kg 310
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 4160
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
49
Strength to Weight: Axial, points 63
16
Strength to Weight: Bending, points 50
23
Thermal Diffusivity, mm2/s 2.9
88
Thermal Shock Resistance, points 72
7.0

Alloy Composition


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Aluminum (Al), % 5.5 to 6.8
98 to 98.8
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
0 to 0.050
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
1.2 to 1.7
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.2
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.15
Titanium (Ti), % 87.5 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Residuals, % 0 to 0.4
0 to 0.15