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EN AC-21100 Aluminum vs. N08028 Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while N08028 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 N08028 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
180
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 6.2 to 7.3
45
Fatigue Strength, MPa 79 to 87
220
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 340 to 350
570
Tensile Strength: Yield (Proof), MPa 210 to 240
240

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 670
1420
Melting Onset (Solidus), °C 550
1370
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
12
Thermal Expansion, µm/m-K 23
16

Otherwise Unclassified Properties

Base Metal Price, % relative 11
37
Density, g/cm3 3.0
8.1
Embodied Carbon, kg CO2/kg material 8.0
6.4
Embodied Energy, MJ/kg 150
89
Embodied Water, L/kg 1150
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
210
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 31 to 33
19
Strength to Weight: Bending, points 36 to 37
19
Thermal Diffusivity, mm2/s 48
3.2
Thermal Shock Resistance, points 15
12

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
26 to 28
Copper (Cu), % 4.2 to 5.2
0.6 to 1.4
Iron (Fe), % 0 to 0.19
29 to 40.4
Manganese (Mn), % 0 to 0.55
0 to 2.5
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0
30 to 34
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.18
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0