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Grade 27 Titanium vs. 4015 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 4015 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 4015 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 27
1.1 to 23
Fatigue Strength, MPa 170
46 to 71
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Shear Strength, MPa 180
82 to 120
Tensile Strength: Ultimate (UTS), MPa 270
130 to 220
Tensile Strength: Yield (Proof), MPa 230
50 to 200

Thermal Properties

Latent Heat of Fusion, J/g 420
420
Maximum Temperature: Mechanical, °C 320
160
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
600
Specific Heat Capacity, J/kg-K 540
900
Thermal Conductivity, W/m-K 21
160
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
41
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
130

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 4.5
2.7
Embodied Carbon, kg CO2/kg material 33
8.1
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
2.4 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 240
18 to 290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 17
13 to 22
Strength to Weight: Bending, points 21
21 to 30
Thermal Diffusivity, mm2/s 8.8
66
Thermal Shock Resistance, points 21
5.7 to 9.7

Alloy Composition

Aluminum (Al), % 0
94.9 to 97.9
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
0 to 0.2
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.7
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 0
0.6 to 1.2
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
1.4 to 2.2
Titanium (Ti), % 99 to 99.92
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15