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Grade 15 Titanium vs. 7020 Aluminum

Grade 15 titanium belongs to the titanium alloys classification, while 7020 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 15 titanium and the bottom bar is 7020 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 20
8.4 to 14
Fatigue Strength, MPa 290
110 to 130
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Shear Strength, MPa 340
110 to 230
Tensile Strength: Ultimate (UTS), MPa 540
190 to 390
Tensile Strength: Yield (Proof), MPa 430
120 to 310

Thermal Properties

Latent Heat of Fusion, J/g 420
380
Maximum Temperature: Mechanical, °C 320
210
Melting Completion (Liquidus), °C 1660
650
Melting Onset (Solidus), °C 1610
610
Specific Heat Capacity, J/kg-K 540
880
Thermal Conductivity, W/m-K 21
150
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
39
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
120

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 4.5
2.9
Embodied Carbon, kg CO2/kg material 32
8.3
Embodied Energy, MJ/kg 520
150
Embodied Water, L/kg 210
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
23 to 46
Resilience: Unit (Modulus of Resilience), kJ/m3 870
110 to 690
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
47
Strength to Weight: Axial, points 33
18 to 37
Strength to Weight: Bending, points 33
25 to 41
Thermal Diffusivity, mm2/s 8.4
59
Thermal Shock Resistance, points 41
8.3 to 17

Alloy Composition

Aluminum (Al), % 0
91.2 to 94.8
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0.1 to 0.35
Copper (Cu), % 0
0 to 0.2
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
0 to 0.4
Magnesium (Mg), % 0
1.0 to 1.4
Manganese (Mn), % 0
0.050 to 0.5
Nickel (Ni), % 0.4 to 0.6
0
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.25
0
Ruthenium (Ru), % 0.040 to 0.060
0
Silicon (Si), % 0
0 to 0.35
Titanium (Ti), % 98.2 to 99.56
0 to 0.25
Zinc (Zn), % 0
4.0 to 5.0
Zirconium (Zr), % 0
0.080 to 0.25
Residuals, % 0
0 to 0.15