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355.0 Aluminum vs. EN 1.4418 Stainless Steel

355.0 aluminum belongs to the aluminum alloys classification, while EN 1.4418 stainless steel belongs to the iron alloys. There are 30 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 355.0 aluminum and the bottom bar is EN 1.4418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 1.5 to 2.6
16 to 20
Fatigue Strength, MPa 55 to 70
350 to 480
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 150 to 240
530 to 620
Tensile Strength: Ultimate (UTS), MPa 200 to 260
860 to 1000
Tensile Strength: Yield (Proof), MPa 150 to 190
540 to 790

Thermal Properties

Latent Heat of Fusion, J/g 470
280
Maximum Temperature: Mechanical, °C 180
870
Melting Completion (Liquidus), °C 620
1450
Melting Onset (Solidus), °C 560
1400
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 150 to 170
15
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38 to 43
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120 to 140
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.8
Embodied Energy, MJ/kg 150
39
Embodied Water, L/kg 1120
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.7 to 5.9
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 250
730 to 1590
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
25
Strength to Weight: Axial, points 20 to 27
31 to 36
Strength to Weight: Bending, points 28 to 33
26 to 28
Thermal Diffusivity, mm2/s 60 to 69
4.0
Thermal Shock Resistance, points 9.1 to 12
31 to 36

Alloy Composition

Aluminum (Al), % 90.3 to 94.1
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0 to 0.25
15 to 17
Copper (Cu), % 1.0 to 1.5
0
Iron (Fe), % 0 to 0.6
73.2 to 80.2
Magnesium (Mg), % 0.4 to 0.6
0
Manganese (Mn), % 0 to 0.5
0 to 1.5
Molybdenum (Mo), % 0
0.8 to 1.5
Nickel (Ni), % 0
4.0 to 6.0
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 4.5 to 5.5
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.35
0
Residuals, % 0 to 0.15
0