MakeItFrom.com
Menu (ESC)

Grade 21 Titanium vs. 392.0 Aluminum

Grade 21 titanium belongs to the titanium alloys classification, while 392.0 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is grade 21 titanium and the bottom bar is 392.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
75
Elongation at Break, % 9.0 to 17
0.86
Fatigue Strength, MPa 550 to 660
190
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 51
28
Tensile Strength: Ultimate (UTS), MPa 890 to 1340
290
Tensile Strength: Yield (Proof), MPa 870 to 1170
270

Thermal Properties

Latent Heat of Fusion, J/g 410
670
Maximum Temperature: Mechanical, °C 310
170
Melting Completion (Liquidus), °C 1740
670
Melting Onset (Solidus), °C 1690
580
Specific Heat Capacity, J/kg-K 500
900
Thermal Conductivity, W/m-K 7.5
130
Thermal Expansion, µm/m-K 7.1
19

Otherwise Unclassified Properties

Base Metal Price, % relative 60
10
Density, g/cm3 5.4
2.5
Embodied Carbon, kg CO2/kg material 32
7.5
Embodied Energy, MJ/kg 490
140
Embodied Water, L/kg 180
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 180
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 2760 to 5010
490
Stiffness to Weight: Axial, points 14
17
Stiffness to Weight: Bending, points 32
56
Strength to Weight: Axial, points 46 to 69
32
Strength to Weight: Bending, points 38 to 50
39
Thermal Diffusivity, mm2/s 2.8
60
Thermal Shock Resistance, points 66 to 100
15

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
73.9 to 80.6
Carbon (C), % 0 to 0.050
0
Copper (Cu), % 0
0.4 to 0.8
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0 to 1.5
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 0
0.2 to 0.6
Molybdenum (Mo), % 14 to 16
0
Nickel (Ni), % 0
0 to 0.5
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
18 to 20
Tin (Sn), % 0
0 to 0.3
Titanium (Ti), % 76 to 81.2
0 to 0.2
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0 to 0.4
0 to 0.5