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Grade 21 Titanium vs. 6012 Aluminum

Grade 21 titanium belongs to the titanium alloys classification, while 6012 aluminum belongs to the aluminum alloys. There are 28 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 grade 21 titanium and the bottom bar is 6012 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
69
Elongation at Break, % 9.0 to 17
9.1 to 11
Fatigue Strength, MPa 550 to 660
55 to 100
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 51
26
Shear Strength, MPa 550 to 790
130 to 190
Tensile Strength: Ultimate (UTS), MPa 890 to 1340
220 to 320
Tensile Strength: Yield (Proof), MPa 870 to 1170
110 to 260

Thermal Properties

Latent Heat of Fusion, J/g 410
400
Maximum Temperature: Mechanical, °C 310
170
Melting Completion (Liquidus), °C 1740
640
Melting Onset (Solidus), °C 1690
570
Specific Heat Capacity, J/kg-K 500
890
Thermal Conductivity, W/m-K 7.5
160
Thermal Expansion, µm/m-K 7.1
23

Otherwise Unclassified Properties

Base Metal Price, % relative 60
9.5
Density, g/cm3 5.4
2.9
Embodied Carbon, kg CO2/kg material 32
8.2
Embodied Energy, MJ/kg 490
150
Embodied Water, L/kg 180
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 180
21 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 2760 to 5010
94 to 480
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 32
48
Strength to Weight: Axial, points 46 to 69
22 to 32
Strength to Weight: Bending, points 38 to 50
29 to 37
Thermal Diffusivity, mm2/s 2.8
62
Thermal Shock Resistance, points 66 to 100
10 to 14

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
92.2 to 98
Bismuth (Bi), % 0
0 to 0.7
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0 to 0.5
Lead (Pb), % 0
0.4 to 2.0
Magnesium (Mg), % 0
0.6 to 1.2
Manganese (Mn), % 0
0.4 to 1.0
Molybdenum (Mo), % 14 to 16
0
Niobium (Nb), % 2.2 to 3.2
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.17
0
Silicon (Si), % 0.15 to 0.25
0.6 to 1.4
Titanium (Ti), % 76 to 81.2
0 to 0.2
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0 to 0.4
0 to 0.15

Comparable Variants