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5657 Aluminum vs. Grade 21 Titanium

5657 aluminum belongs to the aluminum alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 28 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 5657 aluminum and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
140
Elongation at Break, % 6.6 to 15
9.0 to 17
Fatigue Strength, MPa 74 to 88
550 to 660
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
51
Shear Strength, MPa 92 to 110
550 to 790
Tensile Strength: Ultimate (UTS), MPa 150 to 200
890 to 1340
Tensile Strength: Yield (Proof), MPa 140 to 170
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 180
310
Melting Completion (Liquidus), °C 660
1740
Melting Onset (Solidus), °C 640
1690
Specific Heat Capacity, J/kg-K 900
500
Thermal Conductivity, W/m-K 210
7.5
Thermal Expansion, µm/m-K 24
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
60
Density, g/cm3 2.7
5.4
Embodied Carbon, kg CO2/kg material 8.4
32
Embodied Energy, MJ/kg 160
490
Embodied Water, L/kg 1200
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.7 to 27
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 200
2760 to 5010
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
32
Strength to Weight: Axial, points 15 to 20
46 to 69
Strength to Weight: Bending, points 23 to 28
38 to 50
Thermal Diffusivity, mm2/s 84
2.8
Thermal Shock Resistance, points 6.7 to 8.6
66 to 100

Alloy Composition

Aluminum (Al), % 98.5 to 99.4
2.5 to 3.5
Carbon (C), % 0
0 to 0.050
Copper (Cu), % 0 to 0.1
0
Gallium (Ga), % 0 to 0.030
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.1
0 to 0.4
Magnesium (Mg), % 0.6 to 1.0
0
Manganese (Mn), % 0 to 0.030
0
Molybdenum (Mo), % 0
14 to 16
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Silicon (Si), % 0 to 0.080
0.15 to 0.25
Titanium (Ti), % 0
76 to 81.2
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.050
0
Residuals, % 0
0 to 0.4

Comparable Variants