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7020 Aluminum vs. Grade 18 Titanium

7020 aluminum belongs to the aluminum alloys classification, while grade 18 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 18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
110
Elongation at Break, % 8.4 to 14
11 to 17
Fatigue Strength, MPa 110 to 130
330 to 480
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
40
Shear Strength, MPa 110 to 230
420 to 590
Tensile Strength: Ultimate (UTS), MPa 190 to 390
690 to 980
Tensile Strength: Yield (Proof), MPa 120 to 310
540 to 810

Thermal Properties

Latent Heat of Fusion, J/g 380
410
Maximum Temperature: Mechanical, °C 210
330
Melting Completion (Liquidus), °C 650
1640
Melting Onset (Solidus), °C 610
1590
Specific Heat Capacity, J/kg-K 880
550
Thermal Conductivity, W/m-K 150
8.3
Thermal Expansion, µm/m-K 23
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.7

Otherwise Unclassified Properties

Density, g/cm3 2.9
4.5
Embodied Carbon, kg CO2/kg material 8.3
41
Embodied Energy, MJ/kg 150
670
Embodied Water, L/kg 1150
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
1380 to 3110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
35
Strength to Weight: Axial, points 18 to 37
43 to 61
Strength to Weight: Bending, points 25 to 41
39 to 49
Thermal Diffusivity, mm2/s 59
3.4
Thermal Shock Resistance, points 8.3 to 17
47 to 67

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
2.5 to 3.5
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 0.25
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 0.15
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0 to 0.35
0
Titanium (Ti), % 0 to 0.25
92.5 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.4

Comparable Variants