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7003 Aluminum vs. 2218 Aluminum

Both 7003 aluminum and 2218 aluminum are aluminum alloys. They have a moderately high 93% 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 7003 aluminum and the bottom bar is 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
73
Elongation at Break, % 11
6.8 to 10
Fatigue Strength, MPa 130 to 150
110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 210 to 230
210 to 250
Tensile Strength: Ultimate (UTS), MPa 350 to 390
330 to 430
Tensile Strength: Yield (Proof), MPa 300 to 310
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 200
220
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 510
510
Specific Heat Capacity, J/kg-K 870
870
Thermal Conductivity, W/m-K 150
140
Thermal Expansion, µm/m-K 24
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
37
Electrical Conductivity: Equal Weight (Specific), % IACS 110
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.9
3.1
Embodied Carbon, kg CO2/kg material 8.1
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 41
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 710
450 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
45
Strength to Weight: Axial, points 33 to 37
30 to 39
Strength to Weight: Bending, points 37 to 40
34 to 41
Thermal Diffusivity, mm2/s 59
52
Thermal Shock Resistance, points 15 to 17
15 to 19

Alloy Composition

Aluminum (Al), % 90.6 to 94.5
88.8 to 93.6
Chromium (Cr), % 0 to 0.2
0 to 0.1
Copper (Cu), % 0 to 0.2
3.5 to 4.5
Iron (Fe), % 0 to 0.35
0 to 1.0
Magnesium (Mg), % 0.5 to 1.0
1.2 to 1.8
Manganese (Mn), % 0 to 0.3
0 to 0.2
Nickel (Ni), % 0
1.7 to 2.3
Silicon (Si), % 0 to 0.3
0 to 0.9
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.0 to 6.5
0 to 0.25
Zirconium (Zr), % 0.050 to 0.25
0
Residuals, % 0
0 to 0.15