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EN AC-21100 Aluminum vs. S38815 Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while S38815 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
190
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 6.2 to 7.3
34
Fatigue Strength, MPa 79 to 87
230
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
74
Tensile Strength: Ultimate (UTS), MPa 340 to 350
610
Tensile Strength: Yield (Proof), MPa 210 to 240
290

Thermal Properties

Latent Heat of Fusion, J/g 390
370
Maximum Temperature: Mechanical, °C 170
860
Melting Completion (Liquidus), °C 670
1360
Melting Onset (Solidus), °C 550
1310
Specific Heat Capacity, J/kg-K 880
500
Thermal Expansion, µm/m-K 23
15

Otherwise Unclassified Properties

Base Metal Price, % relative 11
19
Density, g/cm3 3.0
7.5
Embodied Carbon, kg CO2/kg material 8.0
3.8
Embodied Energy, MJ/kg 150
54
Embodied Water, L/kg 1150
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
170
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
22
Strength to Weight: Bending, points 36 to 37
21
Thermal Shock Resistance, points 15
15

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0 to 0.3
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
13 to 15
Copper (Cu), % 4.2 to 5.2
0.75 to 1.5
Iron (Fe), % 0 to 0.19
56.1 to 67
Manganese (Mn), % 0 to 0.55
0 to 2.0
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
13 to 17
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.18
5.5 to 6.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0