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SAE-AISI 5140 Steel vs. A206.0 Aluminum

SAE-AISI 5140 steel belongs to the iron alloys classification, while A206.0 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 5140 steel and the bottom bar is A206.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 290
100 to 110
Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 12 to 29
4.2 to 10
Fatigue Strength, MPa 220 to 570
90 to 180
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 360 to 600
260
Tensile Strength: Ultimate (UTS), MPa 560 to 970
390 to 440
Tensile Strength: Yield (Proof), MPa 290 to 840
250 to 380

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 420
170
Melting Completion (Liquidus), °C 1460
670
Melting Onset (Solidus), °C 1420
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 45
130
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
30
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
90

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.4
8.0
Embodied Energy, MJ/kg 19
150
Embodied Water, L/kg 49
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76 to 180
16 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1880
440 to 1000
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 20 to 34
36 to 41
Strength to Weight: Bending, points 19 to 28
39 to 43
Thermal Diffusivity, mm2/s 12
48
Thermal Shock Resistance, points 16 to 29
17 to 19

Alloy Composition

Aluminum (Al), % 0
93.9 to 95.7
Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.7 to 0.9
0
Copper (Cu), % 0
4.2 to 5.0
Iron (Fe), % 97.3 to 98.1
0 to 0.1
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0.7 to 0.9
0 to 0.2
Nickel (Ni), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.050
Sulfur (S), % 0 to 0.040
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0.15 to 0.3
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15