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Grade 20 Titanium vs. 7108A Aluminum

Grade 20 titanium belongs to the titanium alloys classification, while 7108A aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
69
Elongation at Break, % 5.7 to 17
11 to 13
Fatigue Strength, MPa 550 to 630
120 to 130
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 47
26
Shear Strength, MPa 560 to 740
210
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
350
Tensile Strength: Yield (Proof), MPa 850 to 1190
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 370
210
Melting Completion (Liquidus), °C 1660
630
Melting Onset (Solidus), °C 1600
520
Specific Heat Capacity, J/kg-K 520
870
Thermal Expansion, µm/m-K 9.6
24

Otherwise Unclassified Properties

Density, g/cm3 5.0
2.9
Embodied Carbon, kg CO2/kg material 52
8.3
Embodied Energy, MJ/kg 860
150
Embodied Water, L/kg 350
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
38 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
610 to 640
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 33
47
Strength to Weight: Axial, points 50 to 70
33 to 34
Strength to Weight: Bending, points 41 to 52
38
Thermal Shock Resistance, points 55 to 77
15 to 16

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
91.6 to 94.4
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 5.5 to 6.5
0 to 0.040
Copper (Cu), % 0
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 0.3
Magnesium (Mg), % 0
0.7 to 1.5
Manganese (Mn), % 0
0 to 0.050
Molybdenum (Mo), % 3.5 to 4.5
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.12
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.2
Titanium (Ti), % 71 to 77
0 to 0.030
Vanadium (V), % 7.5 to 8.5
0
Zinc (Zn), % 0
4.8 to 5.8
Zirconium (Zr), % 3.5 to 4.5
0.15 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants