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240.0 Aluminum vs. SAE-AISI 1140 Steel

240.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1140 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 240.0 aluminum and the bottom bar is SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 1.0
14 to 18
Fatigue Strength, MPa 140
230 to 370
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72
Tensile Strength: Ultimate (UTS), MPa 240
600 to 700
Tensile Strength: Yield (Proof), MPa 200
340 to 570

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 180
400
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 520
1420
Specific Heat Capacity, J/kg-K 860
470
Thermal Conductivity, W/m-K 96
51
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 23
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 65
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.8
Density, g/cm3 3.2
7.8
Embodied Carbon, kg CO2/kg material 8.7
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1100
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.2
89 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 280
310 to 870
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 43
24
Strength to Weight: Axial, points 20
21 to 25
Strength to Weight: Bending, points 26
20 to 22
Thermal Diffusivity, mm2/s 35
14
Thermal Shock Resistance, points 11
18 to 21

Alloy Composition

Aluminum (Al), % 81.7 to 86.9
0
Carbon (C), % 0
0.37 to 0.44
Copper (Cu), % 7.0 to 9.0
0
Iron (Fe), % 0 to 0.5
98.4 to 98.9
Magnesium (Mg), % 5.5 to 6.5
0
Manganese (Mn), % 0.3 to 0.7
0.7 to 1.0
Nickel (Ni), % 0.3 to 0.7
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0
0.080 to 0.13
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0