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EN AC-21100 Aluminum vs. 2218 Aluminum

Both EN AC-21100 aluminum and 2218 aluminum are aluminum alloys. They have a very high 96% 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 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
95 to 110
Elastic (Young's, Tensile) Modulus, GPa 71
73
Elongation at Break, % 6.2 to 7.3
6.8 to 10
Fatigue Strength, MPa 79 to 87
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
27
Tensile Strength: Ultimate (UTS), MPa 340 to 350
330 to 430
Tensile Strength: Yield (Proof), MPa 210 to 240
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 390
390
Maximum Temperature: Mechanical, °C 170
220
Melting Completion (Liquidus), °C 670
640
Melting Onset (Solidus), °C 550
510
Specific Heat Capacity, J/kg-K 880
870
Thermal Conductivity, W/m-K 130
140
Thermal Expansion, µm/m-K 23
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
37
Electrical Conductivity: Equal Weight (Specific), % IACS 100
110

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 3.0
3.1
Embodied Carbon, kg CO2/kg material 8.0
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
450 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
45
Strength to Weight: Axial, points 31 to 33
30 to 39
Strength to Weight: Bending, points 36 to 37
34 to 41
Thermal Diffusivity, mm2/s 48
52
Thermal Shock Resistance, points 15
15 to 19

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
88.8 to 93.6
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 4.2 to 5.2
3.5 to 4.5
Iron (Fe), % 0 to 0.19
0 to 1.0
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0 to 0.55
0 to 0.2
Nickel (Ni), % 0
1.7 to 2.3
Silicon (Si), % 0 to 0.18
0 to 0.9
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0 to 0.25
Residuals, % 0
0 to 0.15