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EN AC-21200 Aluminum vs. N08020 Stainless Steel

EN AC-21200 aluminum belongs to the aluminum alloys classification, while N08020 stainless steel belongs to the iron alloys. There are 29 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-21200 aluminum and the bottom bar is N08020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 3.9 to 6.2
15 to 34
Fatigue Strength, MPa 110 to 130
210 to 240
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 410 to 440
610 to 620
Tensile Strength: Yield (Proof), MPa 270 to 360
270 to 420

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 660
1410
Melting Onset (Solidus), °C 550
1360
Specific Heat Capacity, J/kg-K 880
460
Thermal Conductivity, W/m-K 130
12
Thermal Expansion, µm/m-K 23
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 100
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
38
Density, g/cm3 3.0
8.2
Embodied Carbon, kg CO2/kg material 8.0
6.6
Embodied Energy, MJ/kg 150
92
Embodied Water, L/kg 1150
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 22
83 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 930
180 to 440
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 38 to 40
21
Strength to Weight: Bending, points 41 to 43
20
Thermal Diffusivity, mm2/s 49
3.2
Thermal Shock Resistance, points 18 to 19
15

Alloy Composition

Aluminum (Al), % 93.3 to 95.7
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
19 to 21
Copper (Cu), % 4.0 to 5.0
3.0 to 4.0
Iron (Fe), % 0 to 0.2
29.9 to 44
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0.15 to 0.5
0
Manganese (Mn), % 0.2 to 0.5
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.050
32 to 38
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.035
Tin (Sn), % 0 to 0.030
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.1
0