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S20161 Stainless Steel vs. 6101A Aluminum

S20161 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 S20161 stainless steel and the bottom bar is 6101A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 46
11
Fatigue Strength, MPa 360
80
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 690
130
Tensile Strength: Ultimate (UTS), MPa 980
220
Tensile Strength: Yield (Proof), MPa 390
190

Thermal Properties

Latent Heat of Fusion, J/g 330
400
Maximum Temperature: Mechanical, °C 870
160
Melting Completion (Liquidus), °C 1380
640
Melting Onset (Solidus), °C 1330
630
Specific Heat Capacity, J/kg-K 490
900
Thermal Conductivity, W/m-K 15
200
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
55
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
180

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 7.5
2.7
Embodied Carbon, kg CO2/kg material 2.7
8.3
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 130
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 360
24
Resilience: Unit (Modulus of Resilience), kJ/m3 390
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
51
Strength to Weight: Axial, points 36
23
Strength to Weight: Bending, points 29
30
Thermal Diffusivity, mm2/s 4.0
84
Thermal Shock Resistance, points 22
10

Alloy Composition

Aluminum (Al), % 0
97.9 to 99.3
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 15 to 18
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 65.6 to 73.9
0 to 0.4
Magnesium (Mg), % 0
0.4 to 0.9
Manganese (Mn), % 4.0 to 6.0
0
Nickel (Ni), % 4.0 to 6.0
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 3.0 to 4.0
0.3 to 0.7
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.1