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Grade Ti-Pd18 Titanium vs. 8021 Aluminum

Grade Ti-Pd18 titanium belongs to the titanium alloys classification, while 8021 aluminum belongs to the aluminum alloys. There are 28 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-Pd18 titanium and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 17
2.3
Fatigue Strength, MPa 350
61
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
26
Tensile Strength: Ultimate (UTS), MPa 710
160
Tensile Strength: Yield (Proof), MPa 540
130

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 330
170
Melting Completion (Liquidus), °C 1640
650
Melting Onset (Solidus), °C 1590
640
Specific Heat Capacity, J/kg-K 550
900
Thermal Conductivity, W/m-K 8.2
220
Thermal Expansion, µm/m-K 9.1
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
56
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
180

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.8
Embodied Carbon, kg CO2/kg material 41
8.1
Embodied Energy, MJ/kg 670
150
Embodied Water, L/kg 270
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 1380
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
49
Strength to Weight: Axial, points 44
16
Strength to Weight: Bending, points 39
23
Thermal Diffusivity, mm2/s 3.3
88
Thermal Shock Resistance, points 52
7.0

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
98 to 98.8
Carbon (C), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.050
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
1.2 to 1.7
Nickel (Ni), % 0 to 0.050
0
Oxygen (O), % 0 to 0.15
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.15
Titanium (Ti), % 92.5 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0
0 to 0.15