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SAE-AISI 4150 Steel vs. 5154A Aluminum

SAE-AISI 4150 steel belongs to the iron alloys classification, while 5154A aluminum belongs to the aluminum alloys. 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 5154A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 380
58 to 100
Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 12 to 20
1.1 to 19
Fatigue Strength, MPa 260 to 780
83 to 160
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 410 to 800
140 to 210
Tensile Strength: Ultimate (UTS), MPa 660 to 1310
230 to 370
Tensile Strength: Yield (Proof), MPa 380 to 1220
96 to 320

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 420
190
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
600
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 42
130
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
32
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.5
8.8
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 51
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 180
4.0 to 36
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 3930
68 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 24 to 47
24 to 38
Strength to Weight: Bending, points 22 to 34
31 to 43
Thermal Diffusivity, mm2/s 11
53
Thermal Shock Resistance, points 19 to 39
10 to 16

Alloy Composition

Aluminum (Al), % 0
93.7 to 96.9
Carbon (C), % 0.48 to 0.53
0
Chromium (Cr), % 0.8 to 1.1
0 to 0.25
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 96.7 to 97.7
0 to 0.5
Magnesium (Mg), % 0
3.1 to 3.9
Manganese (Mn), % 0.75 to 1.0
0 to 0.5
Molybdenum (Mo), % 0.15 to 0.25
0
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 0.2
Residuals, % 0
0 to 0.15

Comparable Variants