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EN 1.4421 Stainless Steel vs. 224.0 Aluminum

EN 1.4421 stainless steel belongs to the iron alloys classification, while 224.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 1.4421 stainless steel and the bottom bar is 224.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 11 to 17
4.0 to 10
Fatigue Strength, MPa 380 to 520
86 to 120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
380 to 420
Tensile Strength: Yield (Proof), MPa 620 to 950
280 to 330

Thermal Properties

Latent Heat of Fusion, J/g 280
390
Maximum Temperature: Mechanical, °C 870
220
Melting Completion (Liquidus), °C 1440
650
Melting Onset (Solidus), °C 1400
550
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 16
120
Thermal Expansion, µm/m-K 10
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
32
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
95

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 2.6
8.3
Embodied Energy, MJ/kg 36
160
Embodied Water, L/kg 130
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
16 to 35
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
540 to 770
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 31 to 39
35 to 38
Strength to Weight: Bending, points 26 to 30
38 to 41
Thermal Diffusivity, mm2/s 4.4
47
Thermal Shock Resistance, points 31 to 39
17 to 18

Alloy Composition

Aluminum (Al), % 0
93 to 95.2
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 15.5 to 17.5
0
Copper (Cu), % 0
4.5 to 5.5
Iron (Fe), % 74.4 to 80.5
0 to 0.1
Manganese (Mn), % 0 to 1.0
0.2 to 0.5
Molybdenum (Mo), % 0 to 0.7
0
Nickel (Ni), % 4.0 to 5.5
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.8
0 to 0.060
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.35
Vanadium (V), % 0
0.050 to 0.15
Zirconium (Zr), % 0
0.1 to 0.25
Residuals, % 0
0 to 0.1

Comparable Variants