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EN AC-21200 Aluminum vs. N08031 Stainless Steel

EN AC-21200 aluminum belongs to the aluminum alloys classification, while N08031 stainless steel belongs to the iron alloys. There are 27 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-21200 aluminum and the bottom bar is N08031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 3.9 to 6.2
45
Fatigue Strength, MPa 110 to 130
290
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 410 to 440
730
Tensile Strength: Yield (Proof), MPa 270 to 360
310

Thermal Properties

Latent Heat of Fusion, J/g 390
310
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 660
1440
Melting Onset (Solidus), °C 550
1390
Specific Heat Capacity, J/kg-K 880
460
Thermal Conductivity, W/m-K 130
12
Thermal Expansion, µm/m-K 23
18

Otherwise Unclassified Properties

Base Metal Price, % relative 10
39
Density, g/cm3 3.0
8.1
Embodied Carbon, kg CO2/kg material 8.0
7.1
Embodied Energy, MJ/kg 150
96
Embodied Water, L/kg 1150
240

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 22
270
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 930
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 38 to 40
25
Strength to Weight: Bending, points 41 to 43
22
Thermal Diffusivity, mm2/s 49
3.1
Thermal Shock Resistance, points 18 to 19
14

Alloy Composition

Aluminum (Al), % 93.3 to 95.7
0
Carbon (C), % 0
0 to 0.015
Chromium (Cr), % 0
26 to 28
Copper (Cu), % 4.0 to 5.0
1.0 to 1.4
Iron (Fe), % 0 to 0.2
29 to 36.9
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
6.0 to 7.0
Nickel (Ni), % 0 to 0.050
30 to 32
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.3
Sulfur (S), % 0
0 to 0.010
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