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SAE-AISI 4150 Steel vs. 240.0 Aluminum

SAE-AISI 4150 steel belongs to the iron alloys classification, while 240.0 aluminum belongs to the aluminum alloys. There are 29 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 SAE-AISI 4150 steel and the bottom bar is 240.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 12 to 20
1.0
Fatigue Strength, MPa 260 to 780
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Tensile Strength: Ultimate (UTS), MPa 660 to 1310
240
Tensile Strength: Yield (Proof), MPa 380 to 1220
200

Thermal Properties

Latent Heat of Fusion, J/g 250
380
Maximum Temperature: Mechanical, °C 420
180
Melting Completion (Liquidus), °C 1460
600
Melting Onset (Solidus), °C 1420
520
Specific Heat Capacity, J/kg-K 470
860
Thermal Conductivity, W/m-K 42
96
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
23
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
65

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
12
Density, g/cm3 7.8
3.2
Embodied Carbon, kg CO2/kg material 1.5
8.7
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 51
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 180
2.2
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 3930
280
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 24
43
Strength to Weight: Axial, points 24 to 47
20
Strength to Weight: Bending, points 22 to 34
26
Thermal Diffusivity, mm2/s 11
35
Thermal Shock Resistance, points 19 to 39
11

Alloy Composition

Aluminum (Al), % 0
81.7 to 86.9
Carbon (C), % 0.48 to 0.53
0
Chromium (Cr), % 0.8 to 1.1
0
Copper (Cu), % 0
7.0 to 9.0
Iron (Fe), % 96.7 to 97.7
0 to 0.5
Magnesium (Mg), % 0
5.5 to 6.5
Manganese (Mn), % 0.75 to 1.0
0.3 to 0.7
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0
0.3 to 0.7
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15