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Grade 27 Titanium vs. 6151 Aluminum

Grade 27 titanium belongs to the titanium alloys classification, while 6151 aluminum belongs to the aluminum 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 grade 27 titanium and the bottom bar is 6151 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
69
Elongation at Break, % 27
1.1 to 5.7
Fatigue Strength, MPa 170
80 to 100
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Shear Strength, MPa 180
190 to 200
Tensile Strength: Ultimate (UTS), MPa 270
330 to 340
Tensile Strength: Yield (Proof), MPa 230
270 to 280

Thermal Properties

Latent Heat of Fusion, J/g 420
410
Maximum Temperature: Mechanical, °C 320
170
Melting Completion (Liquidus), °C 1660
650
Melting Onset (Solidus), °C 1610
590
Specific Heat Capacity, J/kg-K 540
900
Thermal Conductivity, W/m-K 21
170
Thermal Expansion, µm/m-K 8.7
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
45
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
150

Otherwise Unclassified Properties

Base Metal Price, % relative 37
9.5
Density, g/cm3 4.5
2.7
Embodied Carbon, kg CO2/kg material 33
8.2
Embodied Energy, MJ/kg 530
150
Embodied Water, L/kg 320
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 70
3.5 to 18
Resilience: Unit (Modulus of Resilience), kJ/m3 240
520 to 580
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 17
34
Strength to Weight: Bending, points 21
39
Thermal Diffusivity, mm2/s 8.8
70
Thermal Shock Resistance, points 21
15

Alloy Composition

Aluminum (Al), % 0
95.6 to 98.8
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 0
0.15 to 0.35
Copper (Cu), % 0
0 to 0.35
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0 to 1.0
Magnesium (Mg), % 0
0.45 to 0.8
Manganese (Mn), % 0
0 to 0.2
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Ruthenium (Ru), % 0.080 to 0.14
0
Silicon (Si), % 0
0.6 to 1.2
Titanium (Ti), % 99 to 99.92
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15