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Grade C-2 Titanium vs. 2018 Aluminum

Grade C-2 titanium belongs to the titanium alloys classification, while 2018 aluminum belongs to the aluminum alloys. There are 30 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 C-2 titanium and the bottom bar is 2018 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
120
Elastic (Young's, Tensile) Modulus, GPa 110
73
Elongation at Break, % 17
9.6
Fatigue Strength, MPa 200
120
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
27
Tensile Strength: Ultimate (UTS), MPa 390
420
Tensile Strength: Yield (Proof), MPa 310
310

Thermal Properties

Latent Heat of Fusion, J/g 420
390
Maximum Temperature: Mechanical, °C 320
220
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
510
Specific Heat Capacity, J/kg-K 540
870
Thermal Conductivity, W/m-K 21
150
Thermal Expansion, µm/m-K 8.7
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
40
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
120

Otherwise Unclassified Properties

Base Metal Price, % relative 37
11
Density, g/cm3 4.5
3.1
Embodied Carbon, kg CO2/kg material 31
8.1
Embodied Energy, MJ/kg 510
150
Embodied Water, L/kg 110
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 61
37
Resilience: Unit (Modulus of Resilience), kJ/m3 460
670
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
45
Strength to Weight: Axial, points 24
38
Strength to Weight: Bending, points 26
41
Thermal Diffusivity, mm2/s 8.8
57
Thermal Shock Resistance, points 30
19

Alloy Composition

Aluminum (Al), % 0
89.7 to 94.4
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0
3.5 to 4.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 1.0
Magnesium (Mg), % 0
0.45 to 0.9
Manganese (Mn), % 0
0 to 0.2
Nickel (Ni), % 0 to 0.050
1.7 to 2.3
Oxygen (O), % 0 to 0.4
0
Silicon (Si), % 0
0 to 0.9
Titanium (Ti), % 98.8 to 100
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15