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2618 Aluminum vs. Grade 33 Titanium

2618 aluminum belongs to the aluminum alloys classification, while grade 33 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 33 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 5.8
23
Fatigue Strength, MPa 110
250
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Shear Strength, MPa 260
240
Tensile Strength: Ultimate (UTS), MPa 420
390
Tensile Strength: Yield (Proof), MPa 350
350

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
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 110
6.9

Otherwise Unclassified Properties

Base Metal Price, % relative 11
55
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
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23
86
Resilience: Unit (Modulus of Resilience), kJ/m3 850
590
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
35
Strength to Weight: Axial, points 40
24
Strength to Weight: Bending, points 42
26
Thermal Diffusivity, mm2/s 62
8.7
Thermal Shock Resistance, points 19
30

Alloy Composition

Aluminum (Al), % 92.4 to 94.9
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
0.1 to 0.2
Copper (Cu), % 1.9 to 2.7
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0.9 to 1.3
0 to 0.3
Magnesium (Mg), % 1.3 to 1.8
0
Nickel (Ni), % 0.9 to 1.2
0.35 to 0.55
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.010 to 0.020
Ruthenium (Ru), % 0
0.020 to 0.040
Silicon (Si), % 0.1 to 0.25
0
Titanium (Ti), % 0.040 to 0.1
98.1 to 99.52
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0
0 to 0.4