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2124 Aluminum vs. Grade 7 Titanium

2124 aluminum belongs to the aluminum alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 29 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 2124 aluminum and the bottom bar is grade 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 5.7
24
Fatigue Strength, MPa 130
250
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
38
Shear Strength, MPa 280
270
Tensile Strength: Ultimate (UTS), MPa 490
420
Tensile Strength: Yield (Proof), MPa 430
340

Thermal Properties

Latent Heat of Fusion, J/g 390
420
Maximum Temperature: Mechanical, °C 190
320
Melting Completion (Liquidus), °C 640
1660
Melting Onset (Solidus), °C 500
1610
Specific Heat Capacity, J/kg-K 880
540
Thermal Conductivity, W/m-K 150
22
Thermal Expansion, µm/m-K 23
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 110
7.2

Otherwise Unclassified Properties

Density, g/cm3 3.0
4.5
Embodied Carbon, kg CO2/kg material 8.2
47
Embodied Energy, MJ/kg 150
800
Embodied Water, L/kg 1150
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
95
Resilience: Unit (Modulus of Resilience), kJ/m3 1290
560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
35
Strength to Weight: Axial, points 45
26
Strength to Weight: Bending, points 46
28
Thermal Diffusivity, mm2/s 58
8.9
Thermal Shock Resistance, points 21
31

Alloy Composition

Aluminum (Al), % 91.3 to 94.7
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.3
0 to 0.3
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Silicon (Si), % 0 to 0.2
0
Titanium (Ti), % 0 to 0.15
98.7 to 99.88
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.4