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EN AC-44000 Aluminum vs. S82121 Stainless Steel

EN AC-44000 aluminum belongs to the aluminum alloys classification, while S82121 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 EN AC-44000 aluminum and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 51
250
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 7.3
28
Fatigue Strength, MPa 64
370
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
78
Tensile Strength: Ultimate (UTS), MPa 180
730
Tensile Strength: Yield (Proof), MPa 86
510

Thermal Properties

Latent Heat of Fusion, J/g 560
290
Maximum Temperature: Mechanical, °C 170
1020
Melting Completion (Liquidus), °C 590
1430
Melting Onset (Solidus), °C 590
1380
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 140
15
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
14
Density, g/cm3 2.5
7.7
Embodied Carbon, kg CO2/kg material 7.8
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1070
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
180
Resilience: Unit (Modulus of Resilience), kJ/m3 51
660
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 55
25
Strength to Weight: Axial, points 20
26
Strength to Weight: Bending, points 28
23
Thermal Diffusivity, mm2/s 61
4.0
Thermal Shock Resistance, points 8.4
20

Alloy Composition


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Aluminum (Al), % 87.1 to 90
0
Carbon (C), % 0
0 to 0.035
Chromium (Cr), % 0
21 to 23
Copper (Cu), % 0 to 0.050
0.2 to 1.2
Iron (Fe), % 0 to 0.19
66.7 to 75.4
Magnesium (Mg), % 0 to 0.45
0
Manganese (Mn), % 0 to 0.1
1.0 to 2.5
Molybdenum (Mo), % 0
0.3 to 1.3
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 10 to 11.8
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0