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2218 Aluminum vs. 7003 Aluminum

Both 2218 aluminum and 7003 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 2218 aluminum and the bottom bar is 7003 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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