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7021 Aluminum vs. 204.0 Aluminum

Both 7021 aluminum and 204.0 aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 7021 aluminum and the bottom bar is 204.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
71
Elongation at Break, % 9.4
5.7 to 7.8
Fatigue Strength, MPa 150
63 to 77
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
27
Tensile Strength: Ultimate (UTS), MPa 460
230 to 340
Tensile Strength: Yield (Proof), MPa 390
180 to 220

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 200
170
Melting Completion (Liquidus), °C 630
650
Melting Onset (Solidus), °C 510
580
Specific Heat Capacity, J/kg-K 870
880
Thermal Conductivity, W/m-K 150
120
Thermal Expansion, µm/m-K 24
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
29 to 34
Electrical Conductivity: Equal Weight (Specific), % IACS 120
87 to 100

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.9
3.0
Embodied Carbon, kg CO2/kg material 8.3
8.0
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
12 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
220 to 350
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
46
Strength to Weight: Axial, points 44
21 to 31
Strength to Weight: Bending, points 45
28 to 36
Thermal Diffusivity, mm2/s 59
46
Thermal Shock Resistance, points 20
12 to 18

Alloy Composition


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Aluminum (Al), % 90.7 to 93.7
93.4 to 95.5
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
4.2 to 5.0
Iron (Fe), % 0 to 0.4
0 to 0.35
Magnesium (Mg), % 1.2 to 1.8
0.15 to 0.35
Manganese (Mn), % 0 to 0.1
0 to 0.1
Nickel (Ni), % 0
0 to 0.050
Silicon (Si), % 0 to 0.25
0 to 0.2
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0 to 0.1
0.15 to 0.3
Zinc (Zn), % 5.0 to 6.0
0 to 0.1
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0 to 0.15