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EN 1.4446 Stainless Steel vs. 5040 Aluminum

EN 1.4446 stainless steel belongs to the iron alloys classification, while 5040 aluminum belongs to the aluminum 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 EN 1.4446 stainless steel and the bottom bar is 5040 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
66 to 74
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 23
5.7 to 6.8
Fatigue Strength, MPa 160
100 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 490
240 to 260
Tensile Strength: Yield (Proof), MPa 240
190 to 230

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 980
190
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1410
600
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 14
160
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
41
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
130

Otherwise Unclassified Properties

Base Metal Price, % relative 22
9.5
Density, g/cm3 7.9
2.8
Embodied Carbon, kg CO2/kg material 4.5
8.3
Embodied Energy, MJ/kg 60
150
Embodied Water, L/kg 160
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
14 to 15
Resilience: Unit (Modulus of Resilience), kJ/m3 140
260 to 380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 17
24 to 26
Strength to Weight: Bending, points 17
31 to 32
Thermal Diffusivity, mm2/s 3.6
64
Thermal Shock Resistance, points 11
10 to 11

Alloy Composition

Aluminum (Al), % 0
95.2 to 98
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 16.5 to 18.5
0.1 to 0.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 59.7 to 66.9
0 to 0.7
Magnesium (Mg), % 0
1.0 to 1.5
Manganese (Mn), % 0 to 1.5
0.9 to 1.4
Molybdenum (Mo), % 4.0 to 4.5
0
Nickel (Ni), % 12.5 to 14.5
0
Nitrogen (N), % 0.12 to 0.22
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15