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EN 1.4557 Stainless Steel vs. 6066 Aluminum

EN 1.4557 stainless steel belongs to the iron alloys classification, while 6066 aluminum belongs to the aluminum 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 EN 1.4557 stainless steel and the bottom bar is 6066 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 40
7.8 to 17
Fatigue Strength, MPa 260
94 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 560
160 to 400
Tensile Strength: Yield (Proof), MPa 300
93 to 360

Thermal Properties

Latent Heat of Fusion, J/g 300
410
Maximum Temperature: Mechanical, °C 1090
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
560
Specific Heat Capacity, J/kg-K 460
890
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 17
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
130

Otherwise Unclassified Properties

Base Metal Price, % relative 29
9.5
Density, g/cm3 8.0
2.8
Embodied Carbon, kg CO2/kg material 5.6
8.3
Embodied Energy, MJ/kg 76
150
Embodied Water, L/kg 190
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
23 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 210
61 to 920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 19
16 to 39
Strength to Weight: Bending, points 19
23 to 43
Thermal Diffusivity, mm2/s 4.0
61
Thermal Shock Resistance, points 12
6.9 to 17

Alloy Composition

Aluminum (Al), % 0
93 to 97
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 19.5 to 20.5
0 to 0.4
Copper (Cu), % 0.5 to 1.0
0.7 to 1.2
Iron (Fe), % 49.5 to 56.3
0 to 0.5
Magnesium (Mg), % 0
0.8 to 1.4
Manganese (Mn), % 0 to 1.2
0.6 to 1.1
Molybdenum (Mo), % 6.0 to 7.0
0
Nickel (Ni), % 17.5 to 19.5
0
Nitrogen (N), % 0.18 to 0.24
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0.9 to 1.8
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15