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Grade 27 Titanium vs. 238.0 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 238.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 27 titanium and the bottom bar is 238.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
76
Elongation at Break, % 27
1.5
Fatigue Strength, MPa 170
110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
28
Tensile Strength: Ultimate (UTS), MPa 270
210
Tensile Strength: Yield (Proof), MPa 230
170

Thermal Properties

Latent Heat of Fusion, J/g 420
430
Maximum Temperature: Mechanical, °C 320
170
Melting Completion (Liquidus), °C 1660
600
Melting Onset (Solidus), °C 1610
510
Specific Heat Capacity, J/kg-K 540
840
Thermal Conductivity, W/m-K 21
100
Thermal Expansion, µm/m-K 8.7
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
25
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
67

Otherwise Unclassified Properties

Base Metal Price, % relative 37
12
Density, g/cm3 4.5
3.4
Embodied Carbon, kg CO2/kg material 33
7.4
Embodied Energy, MJ/kg 530
140
Embodied Water, L/kg 320
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
2.9
Resilience: Unit (Modulus of Resilience), kJ/m3 240
180
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 35
42
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 8.8
37
Thermal Shock Resistance, points 21
9.1

Alloy Composition

Aluminum (Al), % 0
81.9 to 84.9
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
9.5 to 10.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
1.0 to 1.5
Magnesium (Mg), % 0
0 to 0.25
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
3.6 to 4.4
Titanium (Ti), % 99 to 99.92
0
Zinc (Zn), % 0
1.0 to 1.5
Residuals, % 0 to 0.4
0