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2124 Aluminum vs. EN 1.4374 Stainless Steel

2124 aluminum belongs to the aluminum alloys classification, while EN 1.4374 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 2124 aluminum and the bottom bar is EN 1.4374 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.7
40
Fatigue Strength, MPa 130
340
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 280
550
Tensile Strength: Ultimate (UTS), MPa 490
800
Tensile Strength: Yield (Proof), MPa 430
400

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 190
920
Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 500
1360
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
14
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.9
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
270
Resilience: Unit (Modulus of Resilience), kJ/m3 1290
400
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 45
29
Strength to Weight: Bending, points 46
25
Thermal Diffusivity, mm2/s 58
4.0
Thermal Shock Resistance, points 21
17

Alloy Composition

Aluminum (Al), % 91.3 to 94.7
0
Carbon (C), % 0
0.050 to 0.1
Chromium (Cr), % 0 to 0.1
17.5 to 18.5
Copper (Cu), % 3.8 to 4.9
0 to 0.4
Iron (Fe), % 0 to 0.3
63.5 to 67.9
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
9.0 to 10
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
5.0 to 6.0
Nitrogen (N), % 0
0.25 to 0.32
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.2
0.3 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0