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Grade 20 Titanium vs. 7049A Aluminum

Grade 20 titanium belongs to the titanium alloys classification, while 7049A 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 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
71
Elongation at Break, % 5.7 to 17
5.0 to 5.7
Fatigue Strength, MPa 550 to 630
180
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 47
27
Shear Strength, MPa 560 to 740
340 to 350
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
580 to 590
Tensile Strength: Yield (Proof), MPa 850 to 1190
500 to 530

Thermal Properties

Latent Heat of Fusion, J/g 400
370
Maximum Temperature: Mechanical, °C 370
200
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1600
430
Specific Heat Capacity, J/kg-K 520
850
Thermal Expansion, µm/m-K 9.6
24

Otherwise Unclassified Properties

Density, g/cm3 5.0
3.1
Embodied Carbon, kg CO2/kg material 52
8.2
Embodied Energy, MJ/kg 860
150
Embodied Water, L/kg 350
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
28 to 32
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
1800 to 1990
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 33
44
Strength to Weight: Axial, points 50 to 70
52 to 53
Strength to Weight: Bending, points 41 to 52
50 to 51
Thermal Shock Resistance, points 55 to 77
25

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
84.6 to 89.5
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 5.5 to 6.5
0.050 to 0.25
Copper (Cu), % 0
1.2 to 1.9
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 0.5
Magnesium (Mg), % 0
2.1 to 3.1
Manganese (Mn), % 0
0 to 0.5
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 0.4
Titanium (Ti), % 71 to 77
0 to 0.25
Vanadium (V), % 7.5 to 8.5
0
Zinc (Zn), % 0
7.2 to 8.4
Zirconium (Zr), % 3.5 to 4.5
0 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants