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S32550 Stainless Steel vs. 6101A Aluminum

S32550 stainless steel belongs to the iron alloys classification, while 6101A aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 S32550 stainless steel and the bottom bar is 6101A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 21
11
Fatigue Strength, MPa 400
80
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
26
Shear Strength, MPa 540
130
Tensile Strength: Ultimate (UTS), MPa 860
220
Tensile Strength: Yield (Proof), MPa 620
190

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1100
160
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1390
630
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 16
200
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
55
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
180

Otherwise Unclassified Properties

Base Metal Price, % relative 20
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 3.8
8.3
Embodied Energy, MJ/kg 53
150
Embodied Water, L/kg 180
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
24
Resilience: Unit (Modulus of Resilience), kJ/m3 940
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 31
23
Strength to Weight: Bending, points 26
30
Thermal Diffusivity, mm2/s 4.4
84
Thermal Shock Resistance, points 23
10

Alloy Composition

Aluminum (Al), % 0
97.9 to 99.3
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 24 to 27
0
Copper (Cu), % 1.5 to 2.5
0 to 0.050
Iron (Fe), % 57.2 to 67
0 to 0.4
Magnesium (Mg), % 0
0.4 to 0.9
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 2.9 to 3.9
0
Nickel (Ni), % 4.5 to 6.5
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.3 to 0.7
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.1