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712.0 Aluminum vs. Grade 27 Titanium

712.0 aluminum belongs to the aluminum alloys classification, while grade 27 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 712.0 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, % 4.5 to 4.7
27
Fatigue Strength, MPa 140 to 180
170
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 27
41
Shear Strength, MPa 180
180
Tensile Strength: Ultimate (UTS), MPa 250 to 260
270
Tensile Strength: Yield (Proof), MPa 180 to 200
230

Thermal Properties

Latent Heat of Fusion, J/g 380
420
Maximum Temperature: Mechanical, °C 190
320
Melting Completion (Liquidus), °C 640
1660
Melting Onset (Solidus), °C 610
1610
Specific Heat Capacity, J/kg-K 870
540
Thermal Conductivity, W/m-K 160
21
Thermal Expansion, µm/m-K 24
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 120
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 1140
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
70
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 270
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
35
Strength to Weight: Axial, points 24 to 25
17
Strength to Weight: Bending, points 30 to 31
21
Thermal Diffusivity, mm2/s 62
8.8
Thermal Shock Resistance, points 11
21

Alloy Composition

Aluminum (Al), % 90.7 to 94
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0.4 to 0.6
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.5
0 to 0.2
Magnesium (Mg), % 0.5 to 0.65
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 0.3
0
Titanium (Ti), % 0.15 to 0.25
99 to 99.92
Zinc (Zn), % 5.0 to 6.5
0
Residuals, % 0
0 to 0.4