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S44800 Stainless Steel vs. EN AC-21100 Aluminum

S44800 stainless steel belongs to the iron alloys classification, while EN AC-21100 aluminum belongs to the aluminum 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 S44800 stainless steel and the bottom bar is EN AC-21100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
100 to 110
Elastic (Young's, Tensile) Modulus, GPa 210
71
Elongation at Break, % 23
6.2 to 7.3
Fatigue Strength, MPa 300
79 to 87
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 82
27
Tensile Strength: Ultimate (UTS), MPa 590
340 to 350
Tensile Strength: Yield (Proof), MPa 450
210 to 240

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
670
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 17
130
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
34
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
100

Otherwise Unclassified Properties

Base Metal Price, % relative 19
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 3.8
8.0
Embodied Energy, MJ/kg 52
150
Embodied Water, L/kg 190
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
19 to 21
Resilience: Unit (Modulus of Resilience), kJ/m3 480
300 to 400
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 21
31 to 33
Strength to Weight: Bending, points 20
36 to 37
Thermal Diffusivity, mm2/s 4.6
48
Thermal Shock Resistance, points 19
15

Alloy Composition

Aluminum (Al), % 0
93.4 to 95.7
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 28 to 30
0
Copper (Cu), % 0 to 0.15
4.2 to 5.2
Iron (Fe), % 62.6 to 66.5
0 to 0.19
Manganese (Mn), % 0 to 0.3
0 to 0.55
Molybdenum (Mo), % 3.5 to 4.2
0
Nickel (Ni), % 2.0 to 2.5
0
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.2
0 to 0.18
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0.15 to 0.3
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.1