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A201.0 Aluminum vs. Grade 21 Titanium

A201.0 aluminum belongs to the aluminum alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 27 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 A201.0 aluminum and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
140
Elongation at Break, % 4.7
9.0 to 17
Fatigue Strength, MPa 97
550 to 660
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
51
Tensile Strength: Ultimate (UTS), MPa 480
890 to 1340
Tensile Strength: Yield (Proof), MPa 420
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 390
410
Maximum Temperature: Mechanical, °C 170
310
Melting Completion (Liquidus), °C 650
1740
Melting Onset (Solidus), °C 570
1690
Specific Heat Capacity, J/kg-K 880
500
Thermal Conductivity, W/m-K 120
7.5
Thermal Expansion, µm/m-K 23
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 11
60
Density, g/cm3 3.0
5.4
Embodied Carbon, kg CO2/kg material 8.1
32
Embodied Energy, MJ/kg 150
490
Embodied Water, L/kg 1150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 1250
2760 to 5010
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
32
Strength to Weight: Axial, points 44
46 to 69
Strength to Weight: Bending, points 45
38 to 50
Thermal Diffusivity, mm2/s 46
2.8
Thermal Shock Resistance, points 21
66 to 100

Alloy Composition


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Aluminum (Al), % 93.7 to 95.5
2.5 to 3.5
Carbon (C), % 0
0 to 0.050
Copper (Cu), % 4.0 to 5.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.1
0 to 0.4
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0.2 to 0.4
0
Molybdenum (Mo), % 0
14 to 16
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Silicon (Si), % 0 to 0.050
0.15 to 0.25
Titanium (Ti), % 0.15 to 0.35
76 to 81.2
Residuals, % 0 to 0.1
0 to 0.4