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EN 1.4000 Stainless Steel vs. 2124 Aluminum

EN 1.4000 stainless steel belongs to the iron alloys classification, while 2124 aluminum belongs to the aluminum alloys. There are 30 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 1.4000 stainless steel and the bottom bar is 2124 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 22
5.7
Fatigue Strength, MPa 170
130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
27
Shear Strength, MPa 320
280
Tensile Strength: Ultimate (UTS), MPa 500
490
Tensile Strength: Yield (Proof), MPa 260
430

Thermal Properties

Latent Heat of Fusion, J/g 280
390
Maximum Temperature: Mechanical, °C 760
190
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
500
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 30
150
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
38
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
110

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
10
Density, g/cm3 7.7
3.0
Embodied Carbon, kg CO2/kg material 1.9
8.2
Embodied Energy, MJ/kg 27
150
Embodied Water, L/kg 100
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91
27
Resilience: Unit (Modulus of Resilience), kJ/m3 180
1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 18
45
Strength to Weight: Bending, points 18
46
Thermal Diffusivity, mm2/s 8.1
58
Thermal Shock Resistance, points 18
21

Alloy Composition

Aluminum (Al), % 0
91.3 to 94.7
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 12 to 14
0 to 0.1
Copper (Cu), % 0
3.8 to 4.9
Iron (Fe), % 83.9 to 88
0 to 0.3
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0 to 1.0
0.3 to 0.9
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15