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Grade 17 Titanium vs. 2618A Aluminum

Grade 17 titanium belongs to the titanium alloys classification, while 2618A aluminum belongs to the aluminum alloys. There are 29 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 17 titanium and the bottom bar is 2618A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
72
Elongation at Break, % 27
4.5
Fatigue Strength, MPa 160
120
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 38
27
Shear Strength, MPa 180
260
Tensile Strength: Ultimate (UTS), MPa 270
440
Tensile Strength: Yield (Proof), MPa 210
410

Thermal Properties

Latent Heat of Fusion, J/g 420
390
Maximum Temperature: Mechanical, °C 320
230
Melting Completion (Liquidus), °C 1660
670
Melting Onset (Solidus), °C 1610
560
Specific Heat Capacity, J/kg-K 540
880
Thermal Conductivity, W/m-K 23
150
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
37
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
110

Otherwise Unclassified Properties

Density, g/cm3 4.5
3.0
Embodied Carbon, kg CO2/kg material 36
8.4
Embodied Energy, MJ/kg 600
150
Embodied Water, L/kg 230
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68
19
Resilience: Unit (Modulus of Resilience), kJ/m3 220
1180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
47
Strength to Weight: Axial, points 17
41
Strength to Weight: Bending, points 21
44
Thermal Diffusivity, mm2/s 9.3
59
Thermal Shock Resistance, points 21
19

Alloy Composition

Aluminum (Al), % 0
91.5 to 95.2
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
1.8 to 2.7
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0.9 to 1.4
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0
0 to 0.25
Nickel (Ni), % 0
0.8 to 1.4
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0.15 to 0.25
Titanium (Ti), % 99.015 to 99.96
0 to 0.2
Zinc (Zn), % 0
0 to 0.15
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15