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7129 Aluminum vs. Titanium 6-7

7129 Aluminum belongs to the aluminum alloys classification, while titanium 6-7 belongs to the titanium 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 7129 Aluminum and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
120
Elongation at Break, % 9.0 to 9.1
11
Fatigue Strength, MPa 150 to 190
530
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
45
Shear Strength, MPa 250 to 260
610
Tensile Strength: Ultimate (UTS), MPa 430
1020
Tensile Strength: Yield (Proof), MPa 380 to 390
900

Thermal Properties

Latent Heat of Fusion, J/g 380
410
Maximum Temperature: Mechanical, °C 180
300
Melting Completion (Liquidus), °C 630
1700
Melting Onset (Solidus), °C 510
1650
Specific Heat Capacity, J/kg-K 880
520
Thermal Expansion, µm/m-K 24
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
75
Density, g/cm3 2.9
5.1
Embodied Carbon, kg CO2/kg material 8.3
34
Embodied Energy, MJ/kg 150
540
Embodied Water, L/kg 1150
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
3460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
32
Strength to Weight: Axial, points 41
56
Strength to Weight: Bending, points 43 to 44
44
Thermal Shock Resistance, points 19
66

Alloy Composition

Aluminum (Al), % 91 to 94
5.5 to 6.5
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.5 to 0.9
0
Gallium (Ga), % 0 to 0.030
0
Hydrogen (H), % 0
0 to 0.0090
Iron (Fe), % 0 to 0.3
0 to 0.25
Magnesium (Mg), % 1.3 to 2.0
0
Manganese (Mn), % 0 to 0.1
0
Molybdenum (Mo), % 0
6.5 to 7.5
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 0.15
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0 to 0.050
84.9 to 88
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
0
Residuals, % 0 to 0.15
0