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204.0 Aluminum vs. 2218 Aluminum

Both 204.0 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 (2, in this case) are not shown.

For each property being compared, the top bar is 204.0 aluminum and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90 to 120
95 to 110
Elastic (Young's, Tensile) Modulus, GPa 71
73
Elongation at Break, % 5.7 to 7.8
6.8 to 10
Fatigue Strength, MPa 63 to 77
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
27
Tensile Strength: Ultimate (UTS), MPa 230 to 340
330 to 430
Tensile Strength: Yield (Proof), MPa 180 to 220
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 390
390
Maximum Temperature: Mechanical, °C 170
220
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 580
510
Specific Heat Capacity, J/kg-K 880
870
Thermal Conductivity, W/m-K 120
140
Thermal Expansion, µm/m-K 19
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29 to 34
37
Electrical Conductivity: Equal Weight (Specific), % IACS 87 to 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 12 to 23
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 350
450 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
45
Strength to Weight: Axial, points 21 to 31
30 to 39
Strength to Weight: Bending, points 28 to 36
34 to 41
Thermal Diffusivity, mm2/s 46
52
Thermal Shock Resistance, points 12 to 18
15 to 19

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
88.8 to 93.6
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 4.2 to 5.0
3.5 to 4.5
Iron (Fe), % 0 to 0.35
0 to 1.0
Magnesium (Mg), % 0.15 to 0.35
1.2 to 1.8
Manganese (Mn), % 0 to 0.1
0 to 0.2
Nickel (Ni), % 0 to 0.050
1.7 to 2.3
Silicon (Si), % 0 to 0.2
0 to 0.9
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.1
0 to 0.25
Residuals, % 0
0 to 0.15