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2218 Aluminum vs. 384.0 Aluminum

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

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

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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