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EN AC-21100 Aluminum vs. 7075 Aluminum

Both EN AC-21100 aluminum and 7075 aluminum are aluminum alloys. They have a moderately high 91% 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 EN AC-21100 aluminum and the bottom bar is 7075 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
70
Elongation at Break, % 6.2 to 7.3
1.8 to 12
Fatigue Strength, MPa 79 to 87
110 to 190
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
26
Tensile Strength: Ultimate (UTS), MPa 340 to 350
240 to 590
Tensile Strength: Yield (Proof), MPa 210 to 240
120 to 510

Thermal Properties

Latent Heat of Fusion, J/g 390
380
Maximum Temperature: Mechanical, °C 170
200
Melting Completion (Liquidus), °C 670
640
Melting Onset (Solidus), °C 550
480
Specific Heat Capacity, J/kg-K 880
870
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
33
Electrical Conductivity: Equal Weight (Specific), % IACS 100
98

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 3.0
3.0
Embodied Carbon, kg CO2/kg material 8.0
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
7.8 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
110 to 1870
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
46
Strength to Weight: Axial, points 31 to 33
22 to 54
Strength to Weight: Bending, points 36 to 37
28 to 52
Thermal Diffusivity, mm2/s 48
50
Thermal Shock Resistance, points 15
10 to 25

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
86.9 to 91.4
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 4.2 to 5.2
1.2 to 2.0
Iron (Fe), % 0 to 0.19
0 to 0.5
Magnesium (Mg), % 0
2.1 to 2.9
Manganese (Mn), % 0 to 0.55
0 to 0.3
Silicon (Si), % 0 to 0.18
0 to 0.4
Titanium (Ti), % 0.15 to 0.3
0 to 0.2
Zinc (Zn), % 0 to 0.070
5.1 to 6.1
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants