MakeItFrom.com
Menu (ESC)

2218 Aluminum vs. Grade 27 Titanium

2218 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 2218 aluminum and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
110
Elongation at Break, % 6.8 to 10
27
Fatigue Strength, MPa 110
170
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Shear Strength, MPa 210 to 250
180
Tensile Strength: Ultimate (UTS), MPa 330 to 430
270
Tensile Strength: Yield (Proof), MPa 260 to 310
230

Thermal Properties

Latent Heat of Fusion, J/g 390
420
Maximum Temperature: Mechanical, °C 220
320
Melting Completion (Liquidus), °C 640
1660
Melting Onset (Solidus), °C 510
1610
Specific Heat Capacity, J/kg-K 870
540
Thermal Conductivity, W/m-K 140
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 3.1
4.5
Embodied Carbon, kg CO2/kg material 8.2
33
Embodied Energy, MJ/kg 150
530
Embodied Water, L/kg 1130
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
70
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
35
Strength to Weight: Axial, points 30 to 39
17
Strength to Weight: Bending, points 34 to 41
21
Thermal Diffusivity, mm2/s 52
8.8
Thermal Shock Resistance, points 15 to 19
21

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0
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 0.015
Iron (Fe), % 0 to 1.0
0 to 0.2
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
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 to 0.9
0
Titanium (Ti), % 0
99 to 99.92
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.4