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SAE-AISI 4150 Steel vs. 6261 Aluminum

SAE-AISI 4150 steel belongs to the iron alloys classification, while 6261 aluminum belongs to the aluminum alloys. There are 30 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 SAE-AISI 4150 steel and the bottom bar is 6261 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 12 to 20
9.0 to 16
Fatigue Strength, MPa 260 to 780
60 to 120
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 410 to 800
90 to 180
Tensile Strength: Ultimate (UTS), MPa 660 to 1310
150 to 300
Tensile Strength: Yield (Proof), MPa 380 to 1220
100 to 260

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 420
160
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
610
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 42
180
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
48
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
160

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
8.3
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 51
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82 to 180
21 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 3930
77 to 500
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 24 to 47
15 to 31
Strength to Weight: Bending, points 22 to 34
23 to 37
Thermal Diffusivity, mm2/s 11
75
Thermal Shock Resistance, points 19 to 39
6.5 to 13

Alloy Composition

Aluminum (Al), % 0
96.6 to 98.6
Carbon (C), % 0.48 to 0.53
0
Chromium (Cr), % 0.8 to 1.1
0 to 0.1
Copper (Cu), % 0
0.15 to 0.4
Iron (Fe), % 96.7 to 97.7
0 to 0.4
Magnesium (Mg), % 0
0.7 to 1.0
Manganese (Mn), % 0.75 to 1.0
0.2 to 0.35
Molybdenum (Mo), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0.4 to 0.7
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15

Comparable Variants