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B390.0 Aluminum vs. Grade 21 Titanium

B390.0 aluminum belongs to the aluminum alloys classification, while grade 21 titanium belongs to the titanium 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.

For each property being compared, the top bar is B390.0 aluminum and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
140
Elongation at Break, % 0.88
9.0 to 17
Fatigue Strength, MPa 170
550 to 660
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 29
51
Tensile Strength: Ultimate (UTS), MPa 320
890 to 1340
Tensile Strength: Yield (Proof), MPa 250
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 640
410
Maximum Temperature: Mechanical, °C 170
310
Melting Completion (Liquidus), °C 580
1740
Melting Onset (Solidus), °C 580
1690
Specific Heat Capacity, J/kg-K 880
500
Thermal Conductivity, W/m-K 130
7.5
Thermal Expansion, µm/m-K 20
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 11
60
Density, g/cm3 2.8
5.4
Embodied Carbon, kg CO2/kg material 7.3
32
Embodied Energy, MJ/kg 130
490
Embodied Water, L/kg 940
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 410
2760 to 5010
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 51
32
Strength to Weight: Axial, points 32
46 to 69
Strength to Weight: Bending, points 38
38 to 50
Thermal Diffusivity, mm2/s 55
2.8
Thermal Shock Resistance, points 15
66 to 100

Alloy Composition


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Aluminum (Al), % 72.7 to 79.6
2.5 to 3.5
Carbon (C), % 0
0 to 0.050
Copper (Cu), % 4.0 to 5.0
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 1.3
0 to 0.4
Magnesium (Mg), % 0.45 to 0.65
0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 0 to 0.1
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Silicon (Si), % 16 to 18
0.15 to 0.25
Titanium (Ti), % 0 to 0.1
76 to 81.2
Zinc (Zn), % 0 to 1.5
0
Residuals, % 0 to 0.2
0 to 0.4