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EN AC-21100 Aluminum vs. S44626 Stainless Steel

EN AC-21100 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 EN AC-21100 aluminum and the bottom bar is S44626 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
190
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 6.2 to 7.3
23
Fatigue Strength, MPa 79 to 87
230
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 340 to 350
540
Tensile Strength: Yield (Proof), MPa 210 to 240
350

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 670
1440
Melting Onset (Solidus), °C 550
1390
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 130
17
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 100
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
14
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.9
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 1150
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
110
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
300
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
26
Strength to Weight: Axial, points 31 to 33
19
Strength to Weight: Bending, points 36 to 37
19
Thermal Diffusivity, mm2/s 48
4.6
Thermal Shock Resistance, points 15
18

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
25 to 27
Copper (Cu), % 4.2 to 5.2
0 to 0.2
Iron (Fe), % 0 to 0.19
68.1 to 74.1
Manganese (Mn), % 0 to 0.55
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 0.18
0 to 0.75
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0.15 to 0.3
0.2 to 1.0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0