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384.0 Aluminum vs. 2218 Aluminum

Both 384.0 aluminum and 2218 aluminum are aluminum alloys. They have 87% of their average alloy composition in common.

For each property being compared, the top bar is 384.0 aluminum and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85
95 to 110
Elastic (Young's, Tensile) Modulus, GPa 74
73
Elongation at Break, % 2.5
6.8 to 10
Fatigue Strength, MPa 140
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 28
27
Shear Strength, MPa 200
210 to 250
Tensile Strength: Ultimate (UTS), MPa 330
330 to 430
Tensile Strength: Yield (Proof), MPa 170
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 550
390
Maximum Temperature: Mechanical, °C 170
220
Melting Completion (Liquidus), °C 580
640
Melting Onset (Solidus), °C 530
510
Specific Heat Capacity, J/kg-K 870
870
Thermal Conductivity, W/m-K 96
140
Thermal Expansion, µm/m-K 21
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 22
37
Electrical Conductivity: Equal Weight (Specific), % IACS 69
110

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 2.9
3.1
Embodied Carbon, kg CO2/kg material 7.4
8.2
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1010
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.9
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 190
450 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
45
Strength to Weight: Axial, points 32
30 to 39
Strength to Weight: Bending, points 37
34 to 41
Thermal Diffusivity, mm2/s 39
52
Thermal Shock Resistance, points 15
15 to 19

Alloy Composition

Aluminum (Al), % 77.3 to 86.5
88.8 to 93.6
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 3.0 to 4.5
3.5 to 4.5
Iron (Fe), % 0 to 1.3
0 to 1.0
Magnesium (Mg), % 0 to 0.1
1.2 to 1.8
Manganese (Mn), % 0 to 0.5
0 to 0.2
Nickel (Ni), % 0 to 0.5
1.7 to 2.3
Silicon (Si), % 10.5 to 12
0 to 0.9
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0 to 0.25
Residuals, % 0
0 to 0.15