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EN AC-44000 Aluminum vs. S31803 Stainless Steel

EN AC-44000 aluminum belongs to the aluminum alloys classification, while S31803 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 EN AC-44000 aluminum and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 51
260
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 7.3
29
Fatigue Strength, MPa 64
370
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 180
710
Tensile Strength: Yield (Proof), MPa 86
500

Thermal Properties

Latent Heat of Fusion, J/g 560
300
Maximum Temperature: Mechanical, °C 170
1060
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 140
16
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
17
Density, g/cm3 2.5
7.8
Embodied Carbon, kg CO2/kg material 7.8
3.6
Embodied Energy, MJ/kg 150
49
Embodied Water, L/kg 1070
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
180
Resilience: Unit (Modulus of Resilience), kJ/m3 51
630
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 55
25
Strength to Weight: Axial, points 20
25
Strength to Weight: Bending, points 28
23
Thermal Diffusivity, mm2/s 61
4.3
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 0.030
Chromium (Cr), % 0
21 to 23
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.19
63.7 to 71.9
Magnesium (Mg), % 0 to 0.45
0
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
4.5 to 6.5
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 10 to 11.8
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0