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Grade 27 Titanium vs. 7022 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 7022 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is 7022 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 27
6.3 to 8.0
Fatigue Strength, MPa 170
140 to 170
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 41
26
Shear Strength, MPa 180
290 to 320
Tensile Strength: Ultimate (UTS), MPa 270
490 to 540
Tensile Strength: Yield (Proof), MPa 230
390 to 460

Thermal Properties

Latent Heat of Fusion, J/g 420
380
Maximum Temperature: Mechanical, °C 320
200
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
480
Specific Heat Capacity, J/kg-K 540
870
Thermal Conductivity, W/m-K 21
140
Thermal Expansion, µm/m-K 8.7
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
21
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
65

Otherwise Unclassified Properties

Base Metal Price, % relative 37
10
Density, g/cm3 4.5
2.9
Embodied Carbon, kg CO2/kg material 33
8.5
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
29 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 240
1100 to 1500
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
47
Strength to Weight: Axial, points 17
47 to 51
Strength to Weight: Bending, points 21
47 to 50
Thermal Diffusivity, mm2/s 8.8
54
Thermal Shock Resistance, points 21
21 to 23

Alloy Composition

Aluminum (Al), % 0
87.9 to 92.4
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0.1 to 0.3
Copper (Cu), % 0
0.5 to 1.0
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.5
Magnesium (Mg), % 0
2.6 to 3.7
Manganese (Mn), % 0
0.1 to 0.4
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0 to 0.5
Titanium (Ti), % 99 to 99.92
0 to 0.2
Zinc (Zn), % 0
4.3 to 5.2
Zirconium (Zr), % 0
0 to 0.2
Residuals, % 0
0 to 0.15