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7175 Aluminum vs. Grade 6 Titanium

7175 aluminum belongs to the aluminum alloys classification, while grade 6 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7175 aluminum and the bottom bar is grade 6 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
100
Elongation at Break, % 3.8 to 5.9
11
Fatigue Strength, MPa 150 to 180
290
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
39
Shear Strength, MPa 290 to 330
530
Tensile Strength: Ultimate (UTS), MPa 520 to 570
890
Tensile Strength: Yield (Proof), MPa 430 to 490
840

Thermal Properties

Latent Heat of Fusion, J/g 380
410
Maximum Temperature: Mechanical, °C 180
310
Melting Completion (Liquidus), °C 640
1580
Melting Onset (Solidus), °C 480
1530
Specific Heat Capacity, J/kg-K 870
550
Thermal Conductivity, W/m-K 140
7.8
Thermal Expansion, µm/m-K 23
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
1.2
Electrical Conductivity: Equal Weight (Specific), % IACS 99
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
36
Density, g/cm3 3.0
4.5
Embodied Carbon, kg CO2/kg material 8.2
30
Embodied Energy, MJ/kg 150
480
Embodied Water, L/kg 1130
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
92
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
3390
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
35
Strength to Weight: Axial, points 48 to 52
55
Strength to Weight: Bending, points 48 to 51
46
Thermal Diffusivity, mm2/s 53
3.2
Thermal Shock Resistance, points 23 to 25
65

Alloy Composition

Aluminum (Al), % 88 to 91.4
4.0 to 6.0
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 0.030
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 0.15
0
Tin (Sn), % 0
2.0 to 3.0
Titanium (Ti), % 0 to 0.1
89.8 to 94
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0
0 to 0.4