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2618A Aluminum vs. S35500 Stainless Steel

2618A aluminum belongs to the aluminum alloys classification, while S35500 stainless steel belongs to the iron alloys. There are 30 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 2618A aluminum and the bottom bar is S35500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 4.5
14
Fatigue Strength, MPa 120
690 to 730
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
78
Shear Strength, MPa 260
810 to 910
Tensile Strength: Ultimate (UTS), MPa 440
1330 to 1490
Tensile Strength: Yield (Proof), MPa 410
1200 to 1280

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Maximum Temperature: Mechanical, °C 230
870
Melting Completion (Liquidus), °C 670
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
16
Thermal Expansion, µm/m-K 23
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 11
16
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.4
3.5
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1150
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 1180
3610 to 4100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 41
47 to 53
Strength to Weight: Bending, points 44
34 to 37
Thermal Diffusivity, mm2/s 59
4.4
Thermal Shock Resistance, points 19
44 to 49

Alloy Composition

Aluminum (Al), % 91.5 to 95.2
0
Carbon (C), % 0
0.1 to 0.15
Chromium (Cr), % 0
15 to 16
Copper (Cu), % 1.8 to 2.7
0
Iron (Fe), % 0.9 to 1.4
73.2 to 77.7
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.25
0.5 to 1.3
Molybdenum (Mo), % 0
2.5 to 3.2
Nickel (Ni), % 0.8 to 1.4
4.0 to 5.0
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0.070 to 0.13
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.15 to 0.25
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.15
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0