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2218 Aluminum vs. 1070A Aluminum

Both 2218 aluminum and 1070A aluminum are aluminum alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is 2218 aluminum and the bottom bar is 1070A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 95 to 110
18 to 40
Elastic (Young's, Tensile) Modulus, GPa 73
68
Elongation at Break, % 6.8 to 10
2.3 to 33
Fatigue Strength, MPa 110
17 to 51
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
26
Shear Strength, MPa 210 to 250
44 to 81
Tensile Strength: Ultimate (UTS), MPa 330 to 430
68 to 140
Tensile Strength: Yield (Proof), MPa 260 to 310
17 to 120

Thermal Properties

Latent Heat of Fusion, J/g 390
400
Maximum Temperature: Mechanical, °C 220
170
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 510
640
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 140
230
Thermal Expansion, µm/m-K 22
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
60
Electrical Conductivity: Equal Weight (Specific), % IACS 110
200

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.0
Density, g/cm3 3.1
2.7
Embodied Carbon, kg CO2/kg material 8.2
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1130
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
3.0 to 18
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
2.1 to 100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
50
Strength to Weight: Axial, points 30 to 39
7.0 to 14
Strength to Weight: Bending, points 34 to 41
14 to 22
Thermal Diffusivity, mm2/s 52
94
Thermal Shock Resistance, points 15 to 19
3.1 to 6.3

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
99.7 to 100
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0 to 0.030
Iron (Fe), % 0 to 1.0
0 to 0.25
Magnesium (Mg), % 1.2 to 1.8
0 to 0.030
Manganese (Mn), % 0 to 0.2
0 to 0.030
Nickel (Ni), % 1.7 to 2.3
0
Silicon (Si), % 0 to 0.9
0 to 0.2
Titanium (Ti), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.25
0 to 0.070
Residuals, % 0 to 0.15
0