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771.0 Aluminum vs. Grade 27 Titanium

771.0 aluminum belongs to the aluminum alloys classification, while grade 27 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is 771.0 aluminum and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
110
Elongation at Break, % 1.7 to 6.5
27
Fatigue Strength, MPa 92 to 180
170
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
41
Tensile Strength: Ultimate (UTS), MPa 250 to 370
270
Tensile Strength: Yield (Proof), MPa 210 to 350
230

Thermal Properties

Latent Heat of Fusion, J/g 380
420
Maximum Temperature: Mechanical, °C 180
320
Melting Completion (Liquidus), °C 630
1660
Melting Onset (Solidus), °C 620
1610
Specific Heat Capacity, J/kg-K 870
540
Thermal Conductivity, W/m-K 140 to 150
21
Thermal Expansion, µm/m-K 24
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 82
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
37
Density, g/cm3 3.0
4.5
Embodied Carbon, kg CO2/kg material 8.0
33
Embodied Energy, MJ/kg 150
530
Embodied Water, L/kg 1130
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 20
70
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 900
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
35
Strength to Weight: Axial, points 23 to 35
17
Strength to Weight: Bending, points 29 to 39
21
Thermal Diffusivity, mm2/s 54 to 58
8.8
Thermal Shock Resistance, points 11 to 16
21

Alloy Composition

Aluminum (Al), % 90.5 to 92.5
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0.060 to 0.2
0
Copper (Cu), % 0 to 0.1
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.15
0 to 0.2
Magnesium (Mg), % 0.8 to 1.0
0
Manganese (Mn), % 0 to 0.1
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0 to 0.15
0
Titanium (Ti), % 0.1 to 0.2
99 to 99.92
Zinc (Zn), % 6.5 to 7.5
0
Residuals, % 0
0 to 0.4