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S39277 Stainless Steel vs. 2618 Aluminum

S39277 stainless steel belongs to the iron alloys classification, while 2618 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 S39277 stainless steel and the bottom bar is 2618 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
120
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 28
5.8
Fatigue Strength, MPa 480
110
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
27
Shear Strength, MPa 600
260
Tensile Strength: Ultimate (UTS), MPa 930
420
Tensile Strength: Yield (Proof), MPa 660
350

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Maximum Temperature: Mechanical, °C 1100
210
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 16
160
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
37
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
110

Otherwise Unclassified Properties

Base Metal Price, % relative 23
11
Density, g/cm3 7.9
2.9
Embodied Carbon, kg CO2/kg material 4.2
8.3
Embodied Energy, MJ/kg 59
150
Embodied Water, L/kg 180
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
23
Resilience: Unit (Modulus of Resilience), kJ/m3 1070
850
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 33
40
Strength to Weight: Bending, points 27
42
Thermal Diffusivity, mm2/s 4.2
62
Thermal Shock Resistance, points 26
19

Alloy Composition

Aluminum (Al), % 0
92.4 to 94.9
Carbon (C), % 0 to 0.025
0
Chromium (Cr), % 24 to 26
0
Copper (Cu), % 1.2 to 2.0
1.9 to 2.7
Iron (Fe), % 56.8 to 64.3
0.9 to 1.3
Magnesium (Mg), % 0
1.3 to 1.8
Manganese (Mn), % 0 to 0.8
0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 6.5 to 8.0
0.9 to 1.2
Nitrogen (N), % 0.23 to 0.33
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.8
0.1 to 0.25
Sulfur (S), % 0 to 0.0020
0
Titanium (Ti), % 0
0.040 to 0.1
Tungsten (W), % 0.8 to 1.2
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15