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5082 Aluminum vs. SAE-AISI 1141 Steel

5082 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1141 steel belongs to the iron alloys. There are 30 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 5082 aluminum and the bottom bar is SAE-AISI 1141 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
190
Elongation at Break, % 1.1
11 to 17
Fatigue Strength, MPa 110 to 130
270 to 430
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
72
Shear Strength, MPa 210 to 230
460 to 480
Tensile Strength: Ultimate (UTS), MPa 380 to 400
740 to 810
Tensile Strength: Yield (Proof), MPa 300 to 340
400 to 700

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 180
400
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 130
51
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
10
Electrical Conductivity: Equal Weight (Specific), % IACS 110
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.9
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.9
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1180
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 4.3
86 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 670 to 870
430 to 1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 39 to 41
26 to 29
Strength to Weight: Bending, points 43 to 45
23 to 25
Thermal Diffusivity, mm2/s 54
14
Thermal Shock Resistance, points 17 to 18
24 to 26

Alloy Composition

Aluminum (Al), % 93.5 to 96
0
Carbon (C), % 0
0.37 to 0.45
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 0 to 0.35
97.7 to 98.2
Magnesium (Mg), % 4.0 to 5.0
0
Manganese (Mn), % 0 to 0.15
1.4 to 1.7
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0
Sulfur (S), % 0
0.080 to 0.13
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0