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SAE-AISI 5155 Steel vs. 5083 Aluminum

SAE-AISI 5155 steel belongs to the iron alloys classification, while 5083 aluminum belongs to the aluminum alloys. There are 31 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 5155 steel and the bottom bar is 5083 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
75 to 110
Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 21
1.1 to 17
Fatigue Strength, MPa 260
93 to 190
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 390
170 to 220
Tensile Strength: Ultimate (UTS), MPa 620
290 to 390
Tensile Strength: Yield (Proof), MPa 380
110 to 340

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 420
190
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1410
580
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 49
120
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
29
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
96

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.4
8.9
Embodied Energy, MJ/kg 19
150
Embodied Water, L/kg 49
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
4.2 to 42
Resilience: Unit (Modulus of Resilience), kJ/m3 380
95 to 860
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 22
29 to 40
Strength to Weight: Bending, points 21
36 to 44
Thermal Diffusivity, mm2/s 13
48
Thermal Shock Resistance, points 20
12 to 17

Alloy Composition


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Aluminum (Al), % 0
92.4 to 95.6
Carbon (C), % 0.51 to 0.59
0
Chromium (Cr), % 0.7 to 0.9
0.050 to 0.25
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 97.2 to 97.9
0 to 0.4
Magnesium (Mg), % 0
4.0 to 4.9
Manganese (Mn), % 0.7 to 0.9
0.4 to 1.0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15