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7175 Aluminum vs. Grade 4 Titanium

7175 aluminum belongs to the aluminum alloys classification, while grade 4 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 7175 aluminum and the bottom bar is grade 4 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
110
Elongation at Break, % 3.8 to 5.9
17
Fatigue Strength, MPa 150 to 180
340
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
41
Shear Strength, MPa 290 to 330
390
Tensile Strength: Ultimate (UTS), MPa 520 to 570
640
Tensile Strength: Yield (Proof), MPa 430 to 490
530

Thermal Properties

Latent Heat of Fusion, J/g 380
420
Maximum Temperature: Mechanical, °C 180
320
Melting Completion (Liquidus), °C 640
1660
Melting Onset (Solidus), °C 480
1610
Specific Heat Capacity, J/kg-K 870
540
Thermal Conductivity, W/m-K 140
19
Thermal Expansion, µm/m-K 23
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 99
6.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
37
Density, g/cm3 3.0
4.5
Embodied Carbon, kg CO2/kg material 8.2
31
Embodied Energy, MJ/kg 150
500
Embodied Water, L/kg 1130
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
100
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
1330
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
35
Strength to Weight: Axial, points 48 to 52
40
Strength to Weight: Bending, points 48 to 51
37
Thermal Diffusivity, mm2/s 53
7.6
Thermal Shock Resistance, points 23 to 25
46

Alloy Composition


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Aluminum (Al), % 88 to 91.4
0
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 0.015
Iron (Fe), % 0 to 0.2
0 to 0.5
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.1
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.4
Silicon (Si), % 0 to 0.15
0
Titanium (Ti), % 0 to 0.1
98.6 to 100
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0 to 0.15
0 to 0.4