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5021 Aluminum vs. S44626 Stainless Steel

5021 aluminum belongs to the aluminum alloys classification, while S44626 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 5021 aluminum and the bottom bar is S44626 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 1.1 to 3.4
23
Fatigue Strength, MPa 85 to 110
230
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
80
Shear Strength, MPa 170
340
Tensile Strength: Ultimate (UTS), MPa 300 to 310
540
Tensile Strength: Yield (Proof), MPa 240 to 270
350

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 180
1100
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 590
1390
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 140
17
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
14
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.6
2.9
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 1180
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1 to 10
110
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 550
300
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
26
Strength to Weight: Axial, points 30 to 32
19
Strength to Weight: Bending, points 37
19
Thermal Diffusivity, mm2/s 57
4.6
Thermal Shock Resistance, points 13 to 14
18

Alloy Composition

Aluminum (Al), % 95.2 to 97.7
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0 to 0.15
25 to 27
Copper (Cu), % 0 to 0.15
0 to 0.2
Iron (Fe), % 0 to 0.5
68.1 to 74.1
Magnesium (Mg), % 2.2 to 2.8
0
Manganese (Mn), % 0.1 to 0.5
0 to 0.75
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 0.75
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0.2 to 1.0
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0