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2218 Aluminum vs. ASTM A182 Grade F12 Class 2

2218 aluminum belongs to the aluminum alloys classification, while ASTM A182 grade F12 class 2 belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 2218 aluminum and the bottom bar is ASTM A182 grade F12 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 95 to 110
180
Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 6.8 to 10
22
Fatigue Strength, MPa 110
220
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 210 to 250
340
Tensile Strength: Ultimate (UTS), MPa 330 to 430
540
Tensile Strength: Yield (Proof), MPa 260 to 310
310

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 220
430
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 510
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
43
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.8
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.2
1.6
Embodied Energy, MJ/kg 150
21
Embodied Water, L/kg 1130
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
100
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 30 to 39
19
Strength to Weight: Bending, points 34 to 41
19
Thermal Diffusivity, mm2/s 52
12
Thermal Shock Resistance, points 15 to 19
16

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0
Carbon (C), % 0
0.1 to 0.2
Chromium (Cr), % 0 to 0.1
0.8 to 1.3
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 1.0
96.4 to 98.3
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0.3 to 0.8
Molybdenum (Mo), % 0
0.44 to 0.65
Nickel (Ni), % 1.7 to 2.3
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.9
0.1 to 0.6
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0