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2218 Aluminum vs. Titanium 6-7

2218 aluminum belongs to the aluminum alloys classification, while titanium 6-7 belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is 2218 aluminum and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
120
Elongation at Break, % 6.8 to 10
11
Fatigue Strength, MPa 110
530
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
45
Shear Strength, MPa 210 to 250
610
Tensile Strength: Ultimate (UTS), MPa 330 to 430
1020
Tensile Strength: Yield (Proof), MPa 260 to 310
900

Thermal Properties

Latent Heat of Fusion, J/g 390
410
Maximum Temperature: Mechanical, °C 220
300
Melting Completion (Liquidus), °C 640
1700
Melting Onset (Solidus), °C 510
1650
Specific Heat Capacity, J/kg-K 870
520
Thermal Expansion, µm/m-K 22
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
75
Density, g/cm3 3.1
5.1
Embodied Carbon, kg CO2/kg material 8.2
34
Embodied Energy, MJ/kg 150
540
Embodied Water, L/kg 1130
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
110
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
3460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
32
Strength to Weight: Axial, points 30 to 39
56
Strength to Weight: Bending, points 34 to 41
44
Thermal Shock Resistance, points 15 to 19
66

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
5.5 to 6.5
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0
Hydrogen (H), % 0
0 to 0.0090
Iron (Fe), % 0 to 1.0
0 to 0.25
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 1.7 to 2.3
0
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 0.9
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
84.9 to 88
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0