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2618A Aluminum vs. EN 1.4374 Stainless Steel

2618A aluminum belongs to the aluminum alloys classification, while EN 1.4374 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 EN 1.4374 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 4.5
40
Fatigue Strength, MPa 120
340
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 260
550
Tensile Strength: Ultimate (UTS), MPa 440
800
Tensile Strength: Yield (Proof), MPa 410
400

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 230
920
Melting Completion (Liquidus), °C 670
1400
Melting Onset (Solidus), °C 560
1360
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 23
17

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 11
14
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.4
2.9
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
270
Resilience: Unit (Modulus of Resilience), kJ/m3 1180
400
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 41
29
Strength to Weight: Bending, points 44
25
Thermal Diffusivity, mm2/s 59
4.0
Thermal Shock Resistance, points 19
17

Alloy Composition

Aluminum (Al), % 91.5 to 95.2
0
Carbon (C), % 0
0.050 to 0.1
Chromium (Cr), % 0
17.5 to 18.5
Copper (Cu), % 1.8 to 2.7
0 to 0.4
Iron (Fe), % 0.9 to 1.4
63.5 to 67.9
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.25
9.0 to 10
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0.8 to 1.4
5.0 to 6.0
Nitrogen (N), % 0
0.25 to 0.32
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.15 to 0.25
0.3 to 0.6
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