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2618 Aluminum vs. EN 1.4405 Stainless Steel

2618 aluminum belongs to the aluminum alloys classification, while EN 1.4405 stainless steel belongs to the iron alloys. There are 29 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 2618 aluminum and the bottom bar is EN 1.4405 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.8
17
Fatigue Strength, MPa 110
370
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 420
860
Tensile Strength: Yield (Proof), MPa 350
610

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Maximum Temperature: Mechanical, °C 210
870
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 160
17
Thermal Expansion, µm/m-K 22
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
13
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
39
Embodied Water, L/kg 1150
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23
130
Resilience: Unit (Modulus of Resilience), kJ/m3 850
950
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 40
31
Strength to Weight: Bending, points 42
26
Thermal Diffusivity, mm2/s 62
4.6
Thermal Shock Resistance, points 19
29

Alloy Composition

Aluminum (Al), % 92.4 to 94.9
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 1.9 to 2.7
0
Iron (Fe), % 0.9 to 1.3
73.6 to 80.3
Magnesium (Mg), % 1.3 to 1.8
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0.7 to 1.5
Nickel (Ni), % 0.9 to 1.2
4.0 to 6.0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.1 to 0.25
0 to 0.8
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0.040 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0