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7108 Aluminum vs. Grade 6 Titanium

7108 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 7108 aluminum and the bottom bar is grade 6 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
100
Elongation at Break, % 11
11
Fatigue Strength, MPa 120
290
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
39
Shear Strength, MPa 210
530
Tensile Strength: Ultimate (UTS), MPa 350
890
Tensile Strength: Yield (Proof), MPa 290
840

Thermal Properties

Latent Heat of Fusion, J/g 380
410
Maximum Temperature: Mechanical, °C 210
310
Melting Completion (Liquidus), °C 630
1580
Melting Onset (Solidus), °C 530
1530
Specific Heat Capacity, J/kg-K 880
550
Thermal Conductivity, W/m-K 150
7.8
Thermal Expansion, µm/m-K 24
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
1.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
36
Density, g/cm3 2.9
4.5
Embodied Carbon, kg CO2/kg material 8.3
30
Embodied Energy, MJ/kg 150
480
Embodied Water, L/kg 1150
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
92
Resilience: Unit (Modulus of Resilience), kJ/m3 620
3390
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
35
Strength to Weight: Axial, points 34
55
Strength to Weight: Bending, points 38
46
Thermal Diffusivity, mm2/s 59
3.2
Thermal Shock Resistance, points 16
65

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
4.0 to 6.0
Carbon (C), % 0
0 to 0.080
Copper (Cu), % 0 to 0.050
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.1
0 to 0.5
Magnesium (Mg), % 0.7 to 1.4
0
Manganese (Mn), % 0 to 0.050
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 0.1
0
Tin (Sn), % 0
2.0 to 3.0
Titanium (Ti), % 0 to 0.050
89.8 to 94
Zinc (Zn), % 4.5 to 5.5
0
Zirconium (Zr), % 0.12 to 0.25
0
Residuals, % 0
0 to 0.4