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EN AC-21100 Aluminum vs. 7020 Aluminum

Both EN AC-21100 aluminum and 7020 aluminum are aluminum alloys. They have a moderately high 94% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN AC-21100 aluminum and the bottom bar is 7020 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
45 to 100
Elastic (Young's, Tensile) Modulus, GPa 71
70
Elongation at Break, % 6.2 to 7.3
8.4 to 14
Fatigue Strength, MPa 79 to 87
110 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
26
Tensile Strength: Ultimate (UTS), MPa 340 to 350
190 to 390
Tensile Strength: Yield (Proof), MPa 210 to 240
120 to 310

Thermal Properties

Latent Heat of Fusion, J/g 390
380
Maximum Temperature: Mechanical, °C 170
210
Melting Completion (Liquidus), °C 670
650
Melting Onset (Solidus), °C 550
610
Specific Heat Capacity, J/kg-K 880
880
Thermal Conductivity, W/m-K 130
150
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
39
Electrical Conductivity: Equal Weight (Specific), % IACS 100
120

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
23 to 46
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
110 to 690
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
47
Strength to Weight: Axial, points 31 to 33
18 to 37
Strength to Weight: Bending, points 36 to 37
25 to 41
Thermal Diffusivity, mm2/s 48
59
Thermal Shock Resistance, points 15
8.3 to 17

Alloy Composition


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Aluminum (Al), % 93.4 to 95.7
91.2 to 94.8
Chromium (Cr), % 0
0.1 to 0.35
Copper (Cu), % 4.2 to 5.2
0 to 0.2
Iron (Fe), % 0 to 0.19
0 to 0.4
Magnesium (Mg), % 0
1.0 to 1.4
Manganese (Mn), % 0 to 0.55
0.050 to 0.5
Silicon (Si), % 0 to 0.18
0 to 0.35
Titanium (Ti), % 0.15 to 0.3
0 to 0.25
Zinc (Zn), % 0 to 0.070
4.0 to 5.0
Zirconium (Zr), % 0
0.080 to 0.25
Residuals, % 0 to 0.1
0 to 0.15

Comparable Variants