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8011A Aluminum vs. S40920 Stainless Steel

8011A aluminum belongs to the aluminum alloys classification, while S40920 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 8011A aluminum and the bottom bar is S40920 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 25 to 50
150
Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 1.7 to 28
22
Fatigue Strength, MPa 33 to 76
130
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
75
Tensile Strength: Ultimate (UTS), MPa 100 to 180
430
Tensile Strength: Yield (Proof), MPa 34 to 170
190

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 170
710
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 630
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 210
26
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 180
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
6.5
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1180
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.0 to 22
78
Resilience: Unit (Modulus of Resilience), kJ/m3 8.2 to 200
97
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 11 to 18
15
Strength to Weight: Bending, points 18 to 26
16
Thermal Diffusivity, mm2/s 86
6.9
Thermal Shock Resistance, points 4.6 to 8.1
15

Alloy Composition

Aluminum (Al), % 97.5 to 99.1
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
10.5 to 11.7
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0.5 to 1.0
85.1 to 89.4
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.4 to 0.8
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.050
0.15 to 0.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0