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Grade 27 Titanium vs. 355.0 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 355.0 aluminum belongs to the aluminum 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 grade 27 titanium and the bottom bar is 355.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
71
Elongation at Break, % 27
1.5 to 2.6
Fatigue Strength, MPa 170
55 to 70
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
27
Shear Strength, MPa 180
150 to 240
Tensile Strength: Ultimate (UTS), MPa 270
200 to 260
Tensile Strength: Yield (Proof), MPa 230
150 to 190

Thermal Properties

Latent Heat of Fusion, J/g 420
470
Maximum Temperature: Mechanical, °C 320
180
Melting Completion (Liquidus), °C 1660
620
Melting Onset (Solidus), °C 1610
560
Specific Heat Capacity, J/kg-K 540
890
Thermal Conductivity, W/m-K 21
150 to 170
Thermal Expansion, µm/m-K 8.7
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
38 to 43
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
120 to 140

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 4.5
2.7
Embodied Carbon, kg CO2/kg material 33
8.0
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
2.7 to 5.9
Resilience: Unit (Modulus of Resilience), kJ/m3 240
150 to 250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
51
Strength to Weight: Axial, points 17
20 to 27
Strength to Weight: Bending, points 21
28 to 33
Thermal Diffusivity, mm2/s 8.8
60 to 69
Thermal Shock Resistance, points 21
9.1 to 12

Alloy Composition

Aluminum (Al), % 0
90.3 to 94.1
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0 to 0.25
Copper (Cu), % 0
1.0 to 1.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 0.6
Magnesium (Mg), % 0
0.4 to 0.6
Manganese (Mn), % 0
0 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
4.5 to 5.5
Titanium (Ti), % 99 to 99.92
0 to 0.25
Zinc (Zn), % 0
0 to 0.35
Residuals, % 0
0 to 0.15