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3203 Aluminum vs. 5021 Aluminum

Both 3203 aluminum and 5021 aluminum are aluminum alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is 3203 aluminum and the bottom bar is 5021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
68
Elongation at Break, % 4.5 to 29
1.1 to 3.4
Fatigue Strength, MPa 46 to 92
85 to 110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 72 to 120
170
Tensile Strength: Ultimate (UTS), MPa 110 to 200
300 to 310
Tensile Strength: Yield (Proof), MPa 39 to 190
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 620
590
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 170
140
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
35
Electrical Conductivity: Equal Weight (Specific), % IACS 140
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
9.5
Density, g/cm3 2.8
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.6
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0 to 25
3.1 to 10
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 250
440 to 550
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 11 to 20
30 to 32
Strength to Weight: Bending, points 19 to 28
37
Thermal Diffusivity, mm2/s 70
57
Thermal Shock Resistance, points 4.9 to 8.8
13 to 14

Alloy Composition

Aluminum (Al), % 96.9 to 99
95.2 to 97.7
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0 to 0.050
0 to 0.15
Iron (Fe), % 0 to 0.7
0 to 0.5
Magnesium (Mg), % 0
2.2 to 2.8
Manganese (Mn), % 1.0 to 1.5
0.1 to 0.5
Silicon (Si), % 0 to 0.6
0 to 0.4
Zinc (Zn), % 0 to 0.1
0 to 0.15
Residuals, % 0
0 to 0.15

Comparable Variants