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AISI 201L Stainless Steel vs. 2618 Aluminum

AISI 201L 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 (2, 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 AISI 201L stainless steel and the bottom bar is 2618 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 320
120
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 22 to 46
5.8
Fatigue Strength, MPa 270 to 530
110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Shear Strength, MPa 520 to 660
260
Tensile Strength: Ultimate (UTS), MPa 740 to 1040
420
Tensile Strength: Yield (Proof), MPa 290 to 790
350

Thermal Properties

Latent Heat of Fusion, J/g 280
390
Maximum Temperature: Mechanical, °C 880
210
Melting Completion (Liquidus), °C 1410
640
Melting Onset (Solidus), °C 1370
550
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 15
160
Thermal Expansion, µm/m-K 17
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
37
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 7.7
2.9
Embodied Carbon, kg CO2/kg material 2.6
8.3
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 140
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210 to 300
23
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1570
850
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 27 to 37
40
Strength to Weight: Bending, points 24 to 30
42
Thermal Diffusivity, mm2/s 4.0
62
Thermal Shock Resistance, points 16 to 23
19

Alloy Composition

Aluminum (Al), % 0
92.4 to 94.9
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
1.9 to 2.7
Iron (Fe), % 67.9 to 75
0.9 to 1.3
Magnesium (Mg), % 0
1.3 to 1.8
Manganese (Mn), % 5.5 to 7.5
0
Nickel (Ni), % 3.5 to 5.5
0.9 to 1.2
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0.1 to 0.25
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0.040 to 0.1
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15