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Grade 27 Titanium vs. 2007 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 2007 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 2007 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
71
Elongation at Break, % 27
5.6 to 8.0
Fatigue Strength, MPa 170
91 to 110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
27
Shear Strength, MPa 180
220 to 250
Tensile Strength: Ultimate (UTS), MPa 270
370 to 420
Tensile Strength: Yield (Proof), MPa 230
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 420
390
Maximum Temperature: Mechanical, °C 320
190
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
510
Specific Heat Capacity, J/kg-K 540
870
Thermal Conductivity, W/m-K 21
130
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
47
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
140

Otherwise Unclassified Properties

Base Metal Price, % relative 37
11
Density, g/cm3 4.5
3.1
Embodied Carbon, kg CO2/kg material 33
8.0
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
21 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 240
390 to 530
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
44
Strength to Weight: Axial, points 17
33 to 38
Strength to Weight: Bending, points 21
37 to 40
Thermal Diffusivity, mm2/s 8.8
48
Thermal Shock Resistance, points 21
16 to 19

Alloy Composition

Aluminum (Al), % 0
87.5 to 95
Bismuth (Bi), % 0
0 to 0.2
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0
3.3 to 4.6
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.8
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 0
0.4 to 1.8
Manganese (Mn), % 0
0.5 to 1.0
Nickel (Ni), % 0
0 to 0.2
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 0.8
Tin (Sn), % 0
0 to 0.2
Titanium (Ti), % 99 to 99.92
0 to 0.2
Zinc (Zn), % 0
0 to 0.8
Residuals, % 0
0 to 0.3