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5182 Aluminum vs. S21800 Stainless Steel

5182 aluminum belongs to the aluminum alloys classification, while S21800 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, 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 5182 aluminum and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 1.1 to 12
40
Fatigue Strength, MPa 100 to 130
330
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 25
75
Shear Strength, MPa 170 to 240
510
Tensile Strength: Ultimate (UTS), MPa 280 to 420
740
Tensile Strength: Yield (Proof), MPa 130 to 360
390

Thermal Properties

Latent Heat of Fusion, J/g 390
340
Maximum Temperature: Mechanical, °C 180
900
Melting Completion (Liquidus), °C 640
1360
Melting Onset (Solidus), °C 590
1310
Specific Heat Capacity, J/kg-K 900
500
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.7
7.5
Embodied Carbon, kg CO2/kg material 8.9
3.1
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1180
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 49
250
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 950
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
26
Strength to Weight: Axial, points 29 to 44
27
Strength to Weight: Bending, points 36 to 47
24
Thermal Shock Resistance, points 12 to 19
17

Alloy Composition

Aluminum (Al), % 93.2 to 95.8
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.1
16 to 18
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 0 to 0.35
59.1 to 65.4
Magnesium (Mg), % 4.0 to 5.0
0
Manganese (Mn), % 0.2 to 0.5
7.0 to 9.0
Nickel (Ni), % 0
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.2
3.5 to 4.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0