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Grade 24 Titanium vs. 4145 Aluminum

Grade 24 titanium belongs to the titanium alloys classification, while 4145 aluminum belongs to the aluminum 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 grade 24 titanium and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
73
Elongation at Break, % 11
2.2
Fatigue Strength, MPa 550
48
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
28
Shear Strength, MPa 610
69
Tensile Strength: Ultimate (UTS), MPa 1010
120
Tensile Strength: Yield (Proof), MPa 940
68

Thermal Properties

Latent Heat of Fusion, J/g 410
540
Maximum Temperature: Mechanical, °C 340
160
Melting Completion (Liquidus), °C 1610
590
Melting Onset (Solidus), °C 1560
520
Specific Heat Capacity, J/kg-K 560
880
Thermal Conductivity, W/m-K 7.1
100
Thermal Expansion, µm/m-K 9.6
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
26
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
84

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.8
Embodied Carbon, kg CO2/kg material 43
7.6
Embodied Energy, MJ/kg 710
140
Embodied Water, L/kg 310
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 4160
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 63
12
Strength to Weight: Bending, points 50
19
Thermal Diffusivity, mm2/s 2.9
42
Thermal Shock Resistance, points 72
5.5

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
83 to 87.4
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0
3.3 to 4.7
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0 to 0.8
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
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
9.3 to 10.7
Titanium (Ti), % 87.5 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0 to 0.4
0 to 0.15