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2618A Aluminum vs. EN 1.4886 Stainless Steel

2618A aluminum belongs to the aluminum alloys classification, while EN 1.4886 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 EN 1.4886 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 4.5
45
Fatigue Strength, MPa 120
280
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 260
400
Tensile Strength: Ultimate (UTS), MPa 440
580
Tensile Strength: Yield (Proof), MPa 410
300

Thermal Properties

Latent Heat of Fusion, J/g 390
320
Maximum Temperature: Mechanical, °C 230
1100
Melting Completion (Liquidus), °C 670
1390
Melting Onset (Solidus), °C 560
1340
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
12
Thermal Expansion, µm/m-K 23
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 11
31
Density, g/cm3 3.0
8.0
Embodied Carbon, kg CO2/kg material 8.4
5.4
Embodied Energy, MJ/kg 150
76
Embodied Water, L/kg 1150
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1180
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 41
20
Strength to Weight: Bending, points 44
19
Thermal Diffusivity, mm2/s 59
3.1
Thermal Shock Resistance, points 19
14

Alloy Composition

Aluminum (Al), % 91.5 to 95.2
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
17 to 20
Copper (Cu), % 1.8 to 2.7
0
Iron (Fe), % 0.9 to 1.4
38.7 to 49
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.25
0 to 2.0
Nickel (Ni), % 0.8 to 1.4
33 to 37
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.15 to 0.25
1.0 to 2.0
Sulfur (S), % 0
0 to 0.015
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