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2618 Aluminum vs. SAE-AISI 1146 Steel

2618 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1146 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 2618 aluminum and the bottom bar is SAE-AISI 1146 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 5.8
13 to 17
Fatigue Strength, MPa 110
240 to 400
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72
Shear Strength, MPa 260
410 to 440
Tensile Strength: Ultimate (UTS), MPa 420
670 to 730
Tensile Strength: Yield (Proof), MPa 350
360 to 630

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 210
400
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 160
51
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.8
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23
93 to 97
Resilience: Unit (Modulus of Resilience), kJ/m3 850
340 to 1050
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 40
24 to 26
Strength to Weight: Bending, points 42
22 to 23
Thermal Diffusivity, mm2/s 62
14
Thermal Shock Resistance, points 19
20 to 22

Alloy Composition

Aluminum (Al), % 92.4 to 94.9
0
Carbon (C), % 0
0.42 to 0.49
Copper (Cu), % 1.9 to 2.7
0
Iron (Fe), % 0.9 to 1.3
98.3 to 98.8
Magnesium (Mg), % 1.3 to 1.8
0
Manganese (Mn), % 0
0.7 to 1.0
Nickel (Ni), % 0.9 to 1.2
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.1 to 0.25
0
Sulfur (S), % 0
0.080 to 0.13
Titanium (Ti), % 0.040 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0