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7020 Aluminum vs. Grade 17 Titanium

7020 aluminum belongs to the aluminum alloys classification, while grade 17 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 7020 aluminum and the bottom bar is grade 17 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
110
Elongation at Break, % 8.4 to 14
27
Fatigue Strength, MPa 110 to 130
160
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
38
Shear Strength, MPa 110 to 230
180
Tensile Strength: Ultimate (UTS), MPa 190 to 390
270
Tensile Strength: Yield (Proof), MPa 120 to 310
210

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
3.7
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.3

Otherwise Unclassified Properties

Density, g/cm3 2.9
4.5
Embodied Carbon, kg CO2/kg material 8.3
36
Embodied Energy, MJ/kg 150
600
Embodied Water, L/kg 1150
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
68
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
35
Strength to Weight: Axial, points 18 to 37
17
Strength to Weight: Bending, points 25 to 41
21
Thermal Diffusivity, mm2/s 59
9.3
Thermal Shock Resistance, points 8.3 to 17
21

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.4
0 to 0.2
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0 to 0.35
0
Titanium (Ti), % 0 to 0.25
99.015 to 99.96
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.4