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Grade 20 Titanium vs. 4147 Aluminum

Grade 20 titanium belongs to the titanium alloys classification, while 4147 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is grade 20 titanium and the bottom bar is 4147 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
72
Elongation at Break, % 5.7 to 17
3.3
Fatigue Strength, MPa 550 to 630
42
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 47
27
Shear Strength, MPa 560 to 740
63
Tensile Strength: Ultimate (UTS), MPa 900 to 1270
110
Tensile Strength: Yield (Proof), MPa 850 to 1190
59

Thermal Properties

Latent Heat of Fusion, J/g 400
570
Maximum Temperature: Mechanical, °C 370
160
Melting Completion (Liquidus), °C 1660
580
Melting Onset (Solidus), °C 1600
560
Specific Heat Capacity, J/kg-K 520
900
Thermal Expansion, µm/m-K 9.6
21

Otherwise Unclassified Properties

Density, g/cm3 5.0
2.5
Embodied Carbon, kg CO2/kg material 52
7.7
Embodied Energy, MJ/kg 860
140
Embodied Water, L/kg 350
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 150
3.1
Resilience: Unit (Modulus of Resilience), kJ/m3 2940 to 5760
24
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 33
55
Strength to Weight: Axial, points 50 to 70
12
Strength to Weight: Bending, points 41 to 52
20
Thermal Shock Resistance, points 55 to 77
5.2

Alloy Composition

Aluminum (Al), % 3.0 to 4.0
85 to 88.9
Beryllium (Be), % 0
0 to 0.00030
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 5.5 to 6.5
0
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.020
0
Iron (Fe), % 0 to 0.3
0 to 0.8
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 0
0 to 0.1
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
11 to 13
Titanium (Ti), % 71 to 77
0
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