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7175 Aluminum vs. Titanium 6-7

7175 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 7175 aluminum and the bottom bar is titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
120
Elongation at Break, % 3.8 to 5.9
11
Fatigue Strength, MPa 150 to 180
530
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
45
Shear Strength, MPa 290 to 330
610
Tensile Strength: Ultimate (UTS), MPa 520 to 570
1020
Tensile Strength: Yield (Proof), MPa 430 to 490
900

Thermal Properties

Latent Heat of Fusion, J/g 380
410
Maximum Temperature: Mechanical, °C 180
300
Melting Completion (Liquidus), °C 640
1700
Melting Onset (Solidus), °C 480
1650
Specific Heat Capacity, J/kg-K 870
520
Thermal Expansion, µm/m-K 23
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
75
Density, g/cm3 3.0
5.1
Embodied Carbon, kg CO2/kg material 8.2
34
Embodied Energy, MJ/kg 150
540
Embodied Water, L/kg 1130
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
3460
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
32
Strength to Weight: Axial, points 48 to 52
56
Strength to Weight: Bending, points 48 to 51
44
Thermal Shock Resistance, points 23 to 25
66

Alloy Composition

Aluminum (Al), % 88 to 91.4
5.5 to 6.5
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.2 to 2.0
0
Hydrogen (H), % 0
0 to 0.0090
Iron (Fe), % 0 to 0.2
0 to 0.25
Magnesium (Mg), % 2.1 to 2.9
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 0.1
84.9 to 88
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0 to 0.15
0