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Titanium 6-7 vs. 7021 Aluminum

Titanium 6-7 belongs to the titanium alloys classification, while 7021 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is titanium 6-7 and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
69
Elongation at Break, % 11
9.4
Fatigue Strength, MPa 530
150
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 45
26
Shear Strength, MPa 610
270
Tensile Strength: Ultimate (UTS), MPa 1020
460
Tensile Strength: Yield (Proof), MPa 900
390

Thermal Properties

Latent Heat of Fusion, J/g 410
380
Maximum Temperature: Mechanical, °C 300
200
Melting Completion (Liquidus), °C 1700
630
Melting Onset (Solidus), °C 1650
510
Specific Heat Capacity, J/kg-K 520
870
Thermal Expansion, µm/m-K 9.3
24

Otherwise Unclassified Properties

Base Metal Price, % relative 75
9.5
Density, g/cm3 5.1
2.9
Embodied Carbon, kg CO2/kg material 34
8.3
Embodied Energy, MJ/kg 540
150
Embodied Water, L/kg 190
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
41
Resilience: Unit (Modulus of Resilience), kJ/m3 3460
1110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 32
47
Strength to Weight: Axial, points 56
44
Strength to Weight: Bending, points 44
45
Thermal Shock Resistance, points 66
20

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
90.7 to 93.7
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.0090
0
Iron (Fe), % 0 to 0.25
0 to 0.4
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0
0 to 0.1
Molybdenum (Mo), % 6.5 to 7.5
0
Niobium (Nb), % 6.5 to 7.5
0
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.2
0
Silicon (Si), % 0
0 to 0.25
Tantalum (Ta), % 0 to 0.5
0
Titanium (Ti), % 84.9 to 88
0 to 0.1
Zinc (Zn), % 0
5.0 to 6.0
Zirconium (Zr), % 0
0.080 to 0.18
Residuals, % 0
0 to 0.15