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Grade 27 Titanium vs. 7475 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 7475 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 7475 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 27
10 to 12
Fatigue Strength, MPa 170
190 to 210
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 41
26
Shear Strength, MPa 180
320 to 350
Tensile Strength: Ultimate (UTS), MPa 270
530 to 590
Tensile Strength: Yield (Proof), MPa 230
440 to 520

Thermal Properties

Latent Heat of Fusion, J/g 420
380
Maximum Temperature: Mechanical, °C 320
180
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 to 160
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
33 to 42
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
98 to 120

Otherwise Unclassified Properties

Base Metal Price, % relative 37
10
Density, g/cm3 4.5
3.0
Embodied Carbon, kg CO2/kg material 33
8.2
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
53 to 68
Resilience: Unit (Modulus of Resilience), kJ/m3 240
1390 to 1920
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
46
Strength to Weight: Axial, points 17
49 to 55
Strength to Weight: Bending, points 21
48 to 52
Thermal Diffusivity, mm2/s 8.8
53 to 63
Thermal Shock Resistance, points 21
23 to 26

Alloy Composition

Aluminum (Al), % 0
88.6 to 91.6
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0.18 to 0.25
Copper (Cu), % 0
1.2 to 1.9
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.12
Magnesium (Mg), % 0
1.9 to 2.6
Manganese (Mn), % 0
0 to 0.060
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 0.1
Titanium (Ti), % 99 to 99.92
0 to 0.060
Zinc (Zn), % 0
5.1 to 6.2
Residuals, % 0
0 to 0.15