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2011 Aluminum vs. S44800 Stainless Steel

2011 aluminum belongs to the aluminum alloys classification, while S44800 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 2011 aluminum and the bottom bar is S44800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 8.5 to 18
23
Fatigue Strength, MPa 74 to 120
300
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
82
Shear Strength, MPa 190 to 250
370
Tensile Strength: Ultimate (UTS), MPa 310 to 420
590
Tensile Strength: Yield (Proof), MPa 140 to 310
450

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 140 to 170
17
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35 to 45
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 100 to 130
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 11
19
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 7.9
3.8
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 1150
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 52
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 680
480
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 44
25
Strength to Weight: Axial, points 27 to 37
21
Strength to Weight: Bending, points 32 to 40
20
Thermal Diffusivity, mm2/s 51 to 64
4.6
Thermal Shock Resistance, points 14 to 19
19

Alloy Composition

Aluminum (Al), % 91.3 to 94.6
0
Bismuth (Bi), % 0.2 to 0.6
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
28 to 30
Copper (Cu), % 5.0 to 6.0
0 to 0.15
Iron (Fe), % 0 to 0.7
62.6 to 66.5
Lead (Pb), % 0.2 to 0.6
0
Manganese (Mn), % 0
0 to 0.3
Molybdenum (Mo), % 0
3.5 to 4.2
Nickel (Ni), % 0
2.0 to 2.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.15
0