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EN 1.4418 Stainless Steel vs. EN AC-45000 Aluminum

EN 1.4418 stainless steel belongs to the iron alloys classification, while EN AC-45000 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 1.4418 stainless steel and the bottom bar is EN AC-45000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 16 to 20
1.1
Fatigue Strength, MPa 350 to 480
75
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 860 to 1000
180
Tensile Strength: Yield (Proof), MPa 540 to 790
110

Thermal Properties

Latent Heat of Fusion, J/g 280
470
Maximum Temperature: Mechanical, °C 870
180
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1400
520
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 10
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
81

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 2.8
7.7
Embodied Energy, MJ/kg 39
140
Embodied Water, L/kg 130
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
1.7
Resilience: Unit (Modulus of Resilience), kJ/m3 730 to 1590
80
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 31 to 36
17
Strength to Weight: Bending, points 26 to 28
24
Thermal Diffusivity, mm2/s 4.0
47
Thermal Shock Resistance, points 31 to 36
8.0

Alloy Composition

Aluminum (Al), % 0
82.2 to 91.8
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 15 to 17
0 to 0.15
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 73.2 to 80.2
0 to 1.0
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 0
0 to 0.55
Manganese (Mn), % 0 to 1.5
0.2 to 0.65
Molybdenum (Mo), % 0.8 to 1.5
0
Nickel (Ni), % 4.0 to 6.0
0 to 0.45
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.7
5.0 to 7.0
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 2.0
Residuals, % 0
0 to 0.35