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1070A Aluminum vs. Grade 21 Titanium

1070A aluminum belongs to the aluminum alloys classification, while grade 21 titanium belongs to the titanium 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 1070A aluminum and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
140
Elongation at Break, % 2.3 to 33
9.0 to 17
Fatigue Strength, MPa 17 to 51
550 to 660
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
51
Shear Strength, MPa 44 to 81
550 to 790
Tensile Strength: Ultimate (UTS), MPa 68 to 140
890 to 1340
Tensile Strength: Yield (Proof), MPa 17 to 120
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 170
310
Melting Completion (Liquidus), °C 640
1740
Melting Onset (Solidus), °C 640
1690
Specific Heat Capacity, J/kg-K 900
500
Thermal Conductivity, W/m-K 230
7.5
Thermal Expansion, µm/m-K 23
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
60
Density, g/cm3 2.7
5.4
Embodied Carbon, kg CO2/kg material 8.2
32
Embodied Energy, MJ/kg 150
490
Embodied Water, L/kg 1200
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.0 to 18
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 100
2760 to 5010
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
32
Strength to Weight: Axial, points 7.0 to 14
46 to 69
Strength to Weight: Bending, points 14 to 22
38 to 50
Thermal Diffusivity, mm2/s 94
2.8
Thermal Shock Resistance, points 3.1 to 6.3
66 to 100

Alloy Composition


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Aluminum (Al), % 99.7 to 100
2.5 to 3.5
Carbon (C), % 0
0 to 0.050
Copper (Cu), % 0 to 0.030
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.25
0 to 0.4
Magnesium (Mg), % 0 to 0.030
0
Manganese (Mn), % 0 to 0.030
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 0.2
0.15 to 0.25
Titanium (Ti), % 0 to 0.030
76 to 81.2
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0
0 to 0.4

Comparable Variants