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A356.0 Aluminum vs. S21600 Stainless Steel

A356.0 aluminum belongs to the aluminum alloys classification, while S21600 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (11, 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 A356.0 aluminum and the bottom bar is S21600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.0 to 6.0
46
Fatigue Strength, MPa 50 to 90
360
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
79
Tensile Strength: Ultimate (UTS), MPa 160 to 270
710
Tensile Strength: Yield (Proof), MPa 83 to 200
390

Thermal Properties

Latent Heat of Fusion, J/g 500
290
Maximum Temperature: Mechanical, °C 170
990
Melting Completion (Liquidus), °C 610
1420
Melting Onset (Solidus), °C 570
1380
Specific Heat Capacity, J/kg-K 900
480
Thermal Expansion, µm/m-K 21
17

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
17
Density, g/cm3 2.6
7.7
Embodied Carbon, kg CO2/kg material 8.0
3.6
Embodied Energy, MJ/kg 150
50
Embodied Water, L/kg 1110
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.8 to 15
270
Resilience: Unit (Modulus of Resilience), kJ/m3 49 to 300
370
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 17 to 29
25
Strength to Weight: Bending, points 25 to 36
23
Thermal Shock Resistance, points 7.6 to 13
15

Alloy Composition

Aluminum (Al), % 91.1 to 93.3
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17.5 to 22
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.2
57.6 to 67.8
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
7.5 to 9.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 6.5 to 7.5
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0