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Grade 27 Titanium vs. 7005 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 7005 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 27 titanium and the bottom bar is 7005 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 27
10 to 20
Fatigue Strength, MPa 170
100 to 190
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Shear Strength, MPa 180
120 to 230
Tensile Strength: Ultimate (UTS), MPa 270
200 to 400
Tensile Strength: Yield (Proof), MPa 230
95 to 350

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
610
Specific Heat Capacity, J/kg-K 540
880
Thermal Conductivity, W/m-K 21
140 to 170
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
35 to 43
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
110 to 130

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 4.5
2.9
Embodied Carbon, kg CO2/kg material 33
8.3
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
32 to 57
Resilience: Unit (Modulus of Resilience), kJ/m3 240
65 to 850
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
47
Strength to Weight: Axial, points 17
19 to 38
Strength to Weight: Bending, points 21
26 to 41
Thermal Diffusivity, mm2/s 8.8
54 to 65
Thermal Shock Resistance, points 21
8.7 to 18

Alloy Composition

Aluminum (Al), % 0
91 to 94.7
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0.060 to 0.2
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.4
Magnesium (Mg), % 0
1.0 to 1.8
Manganese (Mn), % 0
0.2 to 0.7
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 0.35
Titanium (Ti), % 99 to 99.92
0.010 to 0.060
Zinc (Zn), % 0
4.0 to 5.0
Zirconium (Zr), % 0
0.080 to 0.2
Residuals, % 0
0 to 0.15