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5019 Aluminum vs. 7021 Aluminum

Both 5019 aluminum and 7021 aluminum are aluminum alloys. They have a moderately high 94% of their average alloy composition in common.

For each property being compared, the top bar is 5019 aluminum and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
69
Elongation at Break, % 2.2 to 18
9.4
Fatigue Strength, MPa 100 to 160
150
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
26
Shear Strength, MPa 170 to 210
270
Tensile Strength: Ultimate (UTS), MPa 280 to 360
460
Tensile Strength: Yield (Proof), MPa 120 to 300
390

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 180
200
Melting Completion (Liquidus), °C 640
630
Melting Onset (Solidus), °C 540
510
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 130
150
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29
38
Electrical Conductivity: Equal Weight (Specific), % IACS 98
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.7
2.9
Embodied Carbon, kg CO2/kg material 9.0
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.6 to 40
41
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 650
1110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
47
Strength to Weight: Axial, points 29 to 38
44
Strength to Weight: Bending, points 35 to 42
45
Thermal Diffusivity, mm2/s 52
59
Thermal Shock Resistance, points 13 to 16
20

Alloy Composition

Aluminum (Al), % 91.5 to 95.3
90.7 to 93.7
Chromium (Cr), % 0 to 0.2
0 to 0.050
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0 to 0.5
0 to 0.4
Magnesium (Mg), % 4.5 to 5.6
1.2 to 1.8
Manganese (Mn), % 0.1 to 0.6
0 to 0.1
Silicon (Si), % 0 to 0.4
0 to 0.25
Titanium (Ti), % 0 to 0.2
0 to 0.1
Zinc (Zn), % 0 to 0.2
5.0 to 6.0
Zirconium (Zr), % 0
0.080 to 0.18
Residuals, % 0
0 to 0.15