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S31727 Stainless Steel vs. 6105 Aluminum

S31727 stainless steel belongs to the iron alloys classification, while 6105 aluminum belongs to the aluminum 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 S31727 stainless steel and the bottom bar is 6105 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 40
9.0 to 16
Fatigue Strength, MPa 240
95 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
26
Shear Strength, MPa 430
120 to 170
Tensile Strength: Ultimate (UTS), MPa 630
190 to 280
Tensile Strength: Yield (Proof), MPa 270
120 to 270

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1010
160
Melting Completion (Liquidus), °C 1440
650
Melting Onset (Solidus), °C 1390
600
Specific Heat Capacity, J/kg-K 470
900
Thermal Expansion, µm/m-K 16
23

Otherwise Unclassified Properties

Base Metal Price, % relative 24
9.5
Density, g/cm3 8.0
2.7
Embodied Carbon, kg CO2/kg material 4.7
8.3
Embodied Energy, MJ/kg 64
150
Embodied Water, L/kg 180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
25 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 190
100 to 550
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 22
20 to 29
Strength to Weight: Bending, points 20
28 to 35
Thermal Shock Resistance, points 14
8.6 to 12

Alloy Composition

Aluminum (Al), % 0
97.2 to 99
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 19
0 to 0.1
Copper (Cu), % 2.8 to 4.0
0 to 0.1
Iron (Fe), % 53.7 to 61.3
0 to 0.35
Magnesium (Mg), % 0
0.45 to 0.8
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
0
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0.6 to 1.0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15