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EN 1.4557 Stainless Steel vs. 4045 Aluminum

EN 1.4557 stainless steel belongs to the iron alloys classification, while 4045 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 40
2.3
Fatigue Strength, MPa 260
45
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
27
Tensile Strength: Ultimate (UTS), MPa 560
120
Tensile Strength: Yield (Proof), MPa 300
64

Thermal Properties

Latent Heat of Fusion, J/g 300
540
Maximum Temperature: Mechanical, °C 1090
160
Melting Completion (Liquidus), °C 1460
600
Melting Onset (Solidus), °C 1420
580
Specific Heat Capacity, J/kg-K 460
900
Thermal Conductivity, W/m-K 15
170
Thermal Expansion, µm/m-K 17
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
45
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
160

Otherwise Unclassified Properties

Base Metal Price, % relative 29
9.5
Density, g/cm3 8.0
2.6
Embodied Carbon, kg CO2/kg material 5.6
7.8
Embodied Energy, MJ/kg 76
150
Embodied Water, L/kg 190
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 210
29
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
54
Strength to Weight: Axial, points 19
13
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 4.0
74
Thermal Shock Resistance, points 12
5.7

Alloy Composition

Aluminum (Al), % 0
87.4 to 91
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 19.5 to 20.5
0
Copper (Cu), % 0.5 to 1.0
0 to 0.3
Iron (Fe), % 49.5 to 56.3
0 to 0.8
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.2
0 to 0.050
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
9.0 to 11
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15