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Grade 21 Titanium vs. 513.0 Aluminum

Grade 21 titanium belongs to the titanium alloys classification, while 513.0 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 21 titanium and the bottom bar is 513.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
68
Elongation at Break, % 9.0 to 17
5.7
Fatigue Strength, MPa 550 to 660
97
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 51
26
Shear Strength, MPa 550 to 790
170
Tensile Strength: Ultimate (UTS), MPa 890 to 1340
200
Tensile Strength: Yield (Proof), MPa 870 to 1170
120

Thermal Properties

Latent Heat of Fusion, J/g 410
390
Maximum Temperature: Mechanical, °C 310
170
Melting Completion (Liquidus), °C 1740
640
Melting Onset (Solidus), °C 1690
590
Specific Heat Capacity, J/kg-K 500
900
Thermal Conductivity, W/m-K 7.5
130
Thermal Expansion, µm/m-K 7.1
24

Otherwise Unclassified Properties

Base Metal Price, % relative 60
9.5
Density, g/cm3 5.4
2.7
Embodied Carbon, kg CO2/kg material 32
8.8
Embodied Energy, MJ/kg 490
150
Embodied Water, L/kg 180
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 180
9.8
Resilience: Unit (Modulus of Resilience), kJ/m3 2760 to 5010
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 32
50
Strength to Weight: Axial, points 46 to 69
20
Strength to Weight: Bending, points 38 to 50
28
Thermal Diffusivity, mm2/s 2.8
54
Thermal Shock Resistance, points 66 to 100
8.8

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
91.9 to 95.1
Carbon (C), % 0 to 0.050
0
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0 to 0.4
Magnesium (Mg), % 0
3.5 to 4.5
Manganese (Mn), % 0
0 to 0.3
Molybdenum (Mo), % 14 to 16
0
Niobium (Nb), % 2.2 to 3.2
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.17
0
Silicon (Si), % 0.15 to 0.25
0 to 0.3
Titanium (Ti), % 76 to 81.2
0 to 0.2
Zinc (Zn), % 0
1.4 to 2.2
Residuals, % 0 to 0.4
0 to 0.15