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2218 Aluminum vs. 4047 Aluminum

Both 2218 aluminum and 4047 aluminum are aluminum alloys. They have 88% 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 2218 aluminum and the bottom bar is 4047 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
72
Elongation at Break, % 6.8 to 10
3.4
Fatigue Strength, MPa 110
45
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
27
Shear Strength, MPa 210 to 250
69
Tensile Strength: Ultimate (UTS), MPa 330 to 430
120
Tensile Strength: Yield (Proof), MPa 260 to 310
64

Thermal Properties

Latent Heat of Fusion, J/g 390
570
Maximum Temperature: Mechanical, °C 220
160
Melting Completion (Liquidus), °C 640
580
Melting Onset (Solidus), °C 510
580
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 140
130
Thermal Expansion, µm/m-K 22
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
33
Electrical Conductivity: Equal Weight (Specific), % IACS 110
120

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.5
Density, g/cm3 3.1
2.5
Embodied Carbon, kg CO2/kg material 8.2
7.7
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1130
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
3.5
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
28
Stiffness to Weight: Axial, points 13
16
Stiffness to Weight: Bending, points 45
55
Strength to Weight: Axial, points 30 to 39
13
Strength to Weight: Bending, points 34 to 41
21
Thermal Diffusivity, mm2/s 52
59
Thermal Shock Resistance, points 15 to 19
5.6

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
85.3 to 89
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0 to 0.3
Iron (Fe), % 0 to 1.0
0 to 0.8
Magnesium (Mg), % 1.2 to 1.8
0 to 0.1
Manganese (Mn), % 0 to 0.2
0 to 0.15
Nickel (Ni), % 1.7 to 2.3
0
Silicon (Si), % 0 to 0.9
11 to 13
Zinc (Zn), % 0 to 0.25
0 to 0.2
Residuals, % 0
0 to 0.15