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Grade 27 Titanium vs. EN AC-71100 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while EN AC-71100 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is EN AC-71100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
72
Elongation at Break, % 27
1.1
Fatigue Strength, MPa 170
150
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 41
27
Tensile Strength: Ultimate (UTS), MPa 270
260
Tensile Strength: Yield (Proof), MPa 230
230

Thermal Properties

Latent Heat of Fusion, J/g 420
490
Maximum Temperature: Mechanical, °C 320
170
Melting Completion (Liquidus), °C 1660
580
Melting Onset (Solidus), °C 1610
520
Specific Heat Capacity, J/kg-K 540
860
Thermal Expansion, µm/m-K 8.7
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
32
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
97

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 4.5
2.9
Embodied Carbon, kg CO2/kg material 33
7.4
Embodied Energy, MJ/kg 530
140
Embodied Water, L/kg 320
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
2.8
Resilience: Unit (Modulus of Resilience), kJ/m3 240
360
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
47
Strength to Weight: Axial, points 17
25
Strength to Weight: Bending, points 21
31
Thermal Shock Resistance, points 21
12

Alloy Composition

Aluminum (Al), % 0
78.7 to 83.3
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.3
Magnesium (Mg), % 0
0.2 to 0.5
Manganese (Mn), % 0
0 to 0.15
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
7.5 to 9.5
Titanium (Ti), % 99 to 99.92
0 to 0.15
Zinc (Zn), % 0
9.0 to 10.5
Residuals, % 0
0 to 0.15