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Grade 7 Titanium vs. 3103 Aluminum

Grade 7 titanium belongs to the titanium alloys classification, while 3103 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 7 titanium and the bottom bar is 3103 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
27 to 62
Elastic (Young's, Tensile) Modulus, GPa 110
70
Elongation at Break, % 24
1.1 to 28
Fatigue Strength, MPa 250
38 to 83
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 38
26
Shear Strength, MPa 270
68 to 130
Tensile Strength: Ultimate (UTS), MPa 420
100 to 220
Tensile Strength: Yield (Proof), MPa 340
39 to 200

Thermal Properties

Latent Heat of Fusion, J/g 420
400
Maximum Temperature: Mechanical, °C 320
190
Melting Completion (Liquidus), °C 1660
660
Melting Onset (Solidus), °C 1610
640
Specific Heat Capacity, J/kg-K 540
900
Thermal Conductivity, W/m-K 22
160
Thermal Expansion, µm/m-K 9.2
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
42
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
140

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.8
Embodied Carbon, kg CO2/kg material 47
8.2
Embodied Energy, MJ/kg 800
150
Embodied Water, L/kg 470
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
2.4 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 560
11 to 280
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 26
10 to 22
Strength to Weight: Bending, points 28
18 to 30
Thermal Diffusivity, mm2/s 8.9
64
Thermal Shock Resistance, points 31
4.6 to 9.9

Alloy Composition

Aluminum (Al), % 0
96.3 to 99.1
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
0 to 0.7
Magnesium (Mg), % 0
0 to 0.3
Manganese (Mn), % 0
0.9 to 1.5
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.12 to 0.25
0
Silicon (Si), % 0
0 to 0.5
Titanium (Ti), % 98.7 to 99.88
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0 to 0.1
Residuals, % 0
0 to 0.15