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2618 Aluminum vs. Grade 27 Titanium

2618 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 (2, in this case) are not shown.

For each property being compared, the top bar is 2618 aluminum and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 5.8
27
Fatigue Strength, MPa 110
170
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Shear Strength, MPa 260
180
Tensile Strength: Ultimate (UTS), MPa 420
270
Tensile Strength: Yield (Proof), MPa 350
230

Thermal Properties

Latent Heat of Fusion, J/g 390
420
Maximum Temperature: Mechanical, °C 210
320
Melting Completion (Liquidus), °C 640
1660
Melting Onset (Solidus), °C 550
1610
Specific Heat Capacity, J/kg-K 880
540
Thermal Conductivity, W/m-K 160
21
Thermal Expansion, µm/m-K 22
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 110
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 11
37
Density, g/cm3 2.9
4.5
Embodied Carbon, kg CO2/kg material 8.3
33
Embodied Energy, MJ/kg 150
530
Embodied Water, L/kg 1150
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23
70
Resilience: Unit (Modulus of Resilience), kJ/m3 850
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
35
Strength to Weight: Axial, points 40
17
Strength to Weight: Bending, points 42
21
Thermal Diffusivity, mm2/s 62
8.8
Thermal Shock Resistance, points 19
21

Alloy Composition

Aluminum (Al), % 92.4 to 94.9
0
Carbon (C), % 0
0 to 0.080
Copper (Cu), % 1.9 to 2.7
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0.9 to 1.3
0 to 0.2
Magnesium (Mg), % 1.3 to 1.8
0
Nickel (Ni), % 0.9 to 1.2
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), % 0.1 to 0.25
0
Titanium (Ti), % 0.040 to 0.1
99 to 99.92
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0
0 to 0.4