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851.0 Aluminum vs. Grade 25 Titanium

851.0 aluminum belongs to the aluminum alloys classification, while grade 25 titanium belongs to the titanium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is 851.0 aluminum and the bottom bar is grade 25 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
110
Elongation at Break, % 3.9 to 9.1
11
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 130 to 140
1000

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 180
340
Melting Completion (Liquidus), °C 630
1610
Melting Onset (Solidus), °C 360
1560
Specific Heat Capacity, J/kg-K 850
560
Thermal Conductivity, W/m-K 180
7.1
Thermal Expansion, µm/m-K 23
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.0

Otherwise Unclassified Properties

Density, g/cm3 3.1
4.5
Embodied Carbon, kg CO2/kg material 8.4
43
Embodied Energy, MJ/kg 160
700
Embodied Water, L/kg 1140
320

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
35
Strength to Weight: Axial, points 12 to 13
62
Strength to Weight: Bending, points 19 to 20
50
Thermal Diffusivity, mm2/s 69
2.8
Thermal Shock Resistance, points 6.1 to 6.3
71

Alloy Composition

Aluminum (Al), % 86.6 to 91.5
5.5 to 6.8
Carbon (C), % 0
0 to 0.080
Copper (Cu), % 0.7 to 1.3
0
Hydrogen (H), % 0
0 to 0.013
Iron (Fe), % 0 to 0.7
0 to 0.4
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0.3 to 0.7
0.3 to 0.8
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 2.0 to 3.0
0
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
86.7 to 90.6
Vanadium (V), % 0
3.5 to 4.5
Residuals, % 0
0 to 0.4