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Grade Ti-Pd17 Titanium vs. 2218 Aluminum

Grade Ti-Pd17 titanium belongs to the titanium alloys classification, while 2218 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade Ti-Pd17 titanium and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
95 to 110
Elastic (Young's, Tensile) Modulus, GPa 110
73
Elongation at Break, % 22
6.8 to 10
Fatigue Strength, MPa 140
110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
27
Tensile Strength: Ultimate (UTS), MPa 270
330 to 430
Tensile Strength: Yield (Proof), MPa 190
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 420
390
Maximum Temperature: Mechanical, °C 320
220
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
510
Specific Heat Capacity, J/kg-K 540
870
Thermal Conductivity, W/m-K 21
140
Thermal Expansion, µm/m-K 8.7
22

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 4.5
3.1
Embodied Carbon, kg CO2/kg material 36
8.2
Embodied Energy, MJ/kg 600
150
Embodied Water, L/kg 230
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 180
450 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
45
Strength to Weight: Axial, points 17
30 to 39
Strength to Weight: Bending, points 21
34 to 41
Thermal Diffusivity, mm2/s 8.8
52
Thermal Shock Resistance, points 21
15 to 19

Alloy Composition

Aluminum (Al), % 0
88.8 to 93.6
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0
3.5 to 4.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 1.0
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0
0 to 0.2
Nickel (Ni), % 0 to 0.030
1.7 to 2.3
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.9
Titanium (Ti), % 98.9 to 99.96
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15