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EN 1.4458 Stainless Steel vs. 5056 Aluminum

EN 1.4458 stainless steel belongs to the iron alloys classification, while 5056 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 1.4458 stainless steel and the bottom bar is 5056 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
67
Elongation at Break, % 34
4.9 to 31
Fatigue Strength, MPa 150
140 to 200
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
25
Tensile Strength: Ultimate (UTS), MPa 510
290 to 460
Tensile Strength: Yield (Proof), MPa 190
150 to 410

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1370
570
Specific Heat Capacity, J/kg-K 470
910
Thermal Conductivity, W/m-K 16
130
Thermal Expansion, µm/m-K 15
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
29
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
99

Otherwise Unclassified Properties

Base Metal Price, % relative 30
9.5
Density, g/cm3 8.0
2.7
Embodied Carbon, kg CO2/kg material 5.4
9.0
Embodied Energy, MJ/kg 75
150
Embodied Water, L/kg 200
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
12 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 89
170 to 1220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 17
30 to 48
Strength to Weight: Bending, points 18
36 to 50
Thermal Diffusivity, mm2/s 4.2
53
Thermal Shock Resistance, points 12
13 to 20

Alloy Composition


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Aluminum (Al), % 0
93 to 95.4
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 19 to 22
0.050 to 0.2
Copper (Cu), % 0 to 2.0
0 to 0.1
Iron (Fe), % 40.2 to 53
0 to 0.4
Magnesium (Mg), % 0
4.5 to 5.6
Manganese (Mn), % 0 to 2.0
0.050 to 0.2
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 26 to 30
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.025
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15