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Grade 27 Titanium vs. 5021 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 5021 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 5021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
68
Elongation at Break, % 27
1.1 to 3.4
Fatigue Strength, MPa 170
85 to 110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Shear Strength, MPa 180
170
Tensile Strength: Ultimate (UTS), MPa 270
300 to 310
Tensile Strength: Yield (Proof), MPa 230
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 420
400
Maximum Temperature: Mechanical, °C 320
180
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
590
Specific Heat Capacity, J/kg-K 540
900
Thermal Conductivity, W/m-K 21
140
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
35
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
120

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 4.5
2.7
Embodied Carbon, kg CO2/kg material 33
8.6
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
3.1 to 10
Resilience: Unit (Modulus of Resilience), kJ/m3 240
440 to 550
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 17
30 to 32
Strength to Weight: Bending, points 21
37
Thermal Diffusivity, mm2/s 8.8
57
Thermal Shock Resistance, points 21
13 to 14

Alloy Composition

Aluminum (Al), % 0
95.2 to 97.7
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0
0 to 0.15
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.5
Magnesium (Mg), % 0
2.2 to 2.8
Manganese (Mn), % 0
0.1 to 0.5
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 0.4
Titanium (Ti), % 99 to 99.92
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15