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EN AC-21100 Aluminum vs. S42300 Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while S42300 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-21100 aluminum and the bottom bar is S42300 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
330
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 6.2 to 7.3
9.1
Fatigue Strength, MPa 79 to 87
440
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 340 to 350
1100
Tensile Strength: Yield (Proof), MPa 210 to 240
850

Thermal Properties

Latent Heat of Fusion, J/g 390
270
Maximum Temperature: Mechanical, °C 170
750
Melting Completion (Liquidus), °C 670
1470
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
25
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
4.5
Electrical Conductivity: Equal Weight (Specific), % IACS 100
5.2

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.5
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
3.2
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1150
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
93
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
1840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
39
Strength to Weight: Bending, points 36 to 37
30
Thermal Diffusivity, mm2/s 48
6.8
Thermal Shock Resistance, points 15
40

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0.27 to 0.32
Chromium (Cr), % 0
11 to 12
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
82 to 85.1
Manganese (Mn), % 0 to 0.55
1.0 to 1.4
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.18
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0.15 to 0.3
0
Vanadium (V), % 0
0.2 to 0.3
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0