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Grade 20 Titanium vs. 5051A Aluminum

Grade 20 titanium belongs to the titanium alloys classification, while 5051A 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 5051A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
68
Elongation at Break, % 5.7 to 17
18 to 21
Fatigue Strength, MPa 550 to 630
51 to 61
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 47
26
Shear Strength, MPa 560 to 740
110
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
170
Tensile Strength: Yield (Proof), MPa 850 to 1190
56

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 370
190
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1600
610
Specific Heat Capacity, J/kg-K 520
900
Thermal Expansion, µm/m-K 9.6
23

Otherwise Unclassified Properties

Density, g/cm3 5.0
2.7
Embodied Carbon, kg CO2/kg material 52
8.5
Embodied Energy, MJ/kg 860
150
Embodied Water, L/kg 350
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
24 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
23
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 33
50
Strength to Weight: Axial, points 50 to 70
17 to 18
Strength to Weight: Bending, points 41 to 52
25
Thermal Shock Resistance, points 55 to 77
7.6

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
96.1 to 98.6
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 5.5 to 6.5
0 to 0.3
Copper (Cu), % 0
0 to 0.050
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 0.45
Magnesium (Mg), % 0
1.4 to 2.1
Manganese (Mn), % 0
0 to 0.25
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 0.3
Titanium (Ti), % 71 to 77
0 to 0.1
Vanadium (V), % 7.5 to 8.5
0
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 3.5 to 4.5
0
Residuals, % 0
0 to 0.15

Comparable Variants