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Grade C-5 Titanium vs. 4145 Aluminum

Grade C-5 titanium belongs to the titanium alloys classification, while 4145 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade C-5 titanium and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
73
Elongation at Break, % 6.7
2.2
Fatigue Strength, MPa 510
48
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 40
28
Tensile Strength: Ultimate (UTS), MPa 1000
120
Tensile Strength: Yield (Proof), MPa 940
68

Thermal Properties

Latent Heat of Fusion, J/g 410
540
Maximum Temperature: Mechanical, °C 340
160
Melting Completion (Liquidus), °C 1610
590
Melting Onset (Solidus), °C 1560
520
Specific Heat Capacity, J/kg-K 560
880
Thermal Conductivity, W/m-K 7.1
100
Thermal Expansion, µm/m-K 9.6
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
26
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
84

Otherwise Unclassified Properties

Base Metal Price, % relative 36
10
Density, g/cm3 4.4
2.8
Embodied Carbon, kg CO2/kg material 38
7.6
Embodied Energy, MJ/kg 610
140
Embodied Water, L/kg 200
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 66
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 4200
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 63
12
Strength to Weight: Bending, points 50
19
Thermal Diffusivity, mm2/s 2.9
42
Thermal Shock Resistance, points 71
5.5

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
83 to 87.4
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0
3.3 to 4.7
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0 to 0.8
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0 to 0.050
0
Oxygen (O), % 0 to 0.25
0
Silicon (Si), % 0
9.3 to 10.7
Titanium (Ti), % 87.5 to 91
0
Vanadium (V), % 3.5 to 4.5
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15