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Grade 5 Titanium vs. 5251 Aluminum

Grade 5 titanium belongs to the titanium alloys classification, while 5251 aluminum belongs to the aluminum alloys. There are 30 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 5 titanium and the bottom bar is 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
68
Elongation at Break, % 8.6 to 11
2.0 to 19
Fatigue Strength, MPa 530 to 630
59 to 110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
26
Shear Strength, MPa 600 to 710
110 to 160
Tensile Strength: Ultimate (UTS), MPa 1000 to 1190
180 to 280
Tensile Strength: Yield (Proof), MPa 910 to 1110
67 to 250

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 330
180
Melting Completion (Liquidus), °C 1610
650
Melting Onset (Solidus), °C 1650
610
Specific Heat Capacity, J/kg-K 560
900
Thermal Conductivity, W/m-K 6.8
150
Thermal Expansion, µm/m-K 8.9
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
37
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
120

Otherwise Unclassified Properties

Base Metal Price, % relative 36
9.5
Density, g/cm3 4.4
2.7
Embodied Carbon, kg CO2/kg material 38
8.5
Embodied Energy, MJ/kg 610
150
Embodied Water, L/kg 200
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 110
5.4 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 3980 to 5880
33 to 450
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 62 to 75
18 to 29
Strength to Weight: Bending, points 50 to 56
26 to 35
Thermal Diffusivity, mm2/s 2.7
61
Thermal Shock Resistance, points 76 to 91
7.9 to 13

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
95.5 to 98.2
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0
0 to 0.15
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0 to 0.5
Magnesium (Mg), % 0
1.7 to 2.4
Manganese (Mn), % 0
0.1 to 0.5
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.2
0
Silicon (Si), % 0
0 to 0.4
Titanium (Ti), % 87.4 to 91
0 to 0.15
Vanadium (V), % 3.5 to 4.5
0
Yttrium (Y), % 0 to 0.0050
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15

Comparable Variants