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EN 1.4557 Stainless Steel vs. 6106 Aluminum

EN 1.4557 stainless steel belongs to the iron alloys classification, while 6106 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 6106 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 40
9.1
Fatigue Strength, MPa 260
88
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 560
290
Tensile Strength: Yield (Proof), MPa 300
220

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1090
160
Melting Completion (Liquidus), °C 1460
660
Melting Onset (Solidus), °C 1420
610
Specific Heat Capacity, J/kg-K 460
900
Thermal Conductivity, W/m-K 15
190
Thermal Expansion, µm/m-K 17
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
49
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
160

Otherwise Unclassified Properties

Base Metal Price, % relative 29
9.5
Density, g/cm3 8.0
2.7
Embodied Carbon, kg CO2/kg material 5.6
8.3
Embodied Energy, MJ/kg 76
150
Embodied Water, L/kg 190
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
24
Resilience: Unit (Modulus of Resilience), kJ/m3 210
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 19
29
Strength to Weight: Bending, points 19
35
Thermal Diffusivity, mm2/s 4.0
78
Thermal Shock Resistance, points 12
13

Alloy Composition

Aluminum (Al), % 0
97.2 to 99.3
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 19.5 to 20.5
0 to 0.2
Copper (Cu), % 0.5 to 1.0
0 to 0.25
Iron (Fe), % 49.5 to 56.3
0 to 0.35
Magnesium (Mg), % 0
0.4 to 0.8
Manganese (Mn), % 0 to 1.2
0.050 to 0.2
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
0.3 to 0.6
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15