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EN 1.4003 Stainless Steel vs. 2025 Aluminum

EN 1.4003 stainless steel belongs to the iron alloys classification, while 2025 aluminum belongs to the aluminum alloys. There are 31 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 1.4003 stainless steel and the bottom bar is 2025 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
110
Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 22
15
Fatigue Strength, MPa 210
130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
27
Shear Strength, MPa 340
240
Tensile Strength: Ultimate (UTS), MPa 540
400
Tensile Strength: Yield (Proof), MPa 320
260

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Maximum Temperature: Mechanical, °C 720
190
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
520
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 25
150
Thermal Expansion, µm/m-K 10
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
40
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
120

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
10
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.9
7.9
Embodied Energy, MJ/kg 27
150
Embodied Water, L/kg 97
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
55
Resilience: Unit (Modulus of Resilience), kJ/m3 260
450
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 19
37
Strength to Weight: Bending, points 19
40
Thermal Diffusivity, mm2/s 6.7
58
Thermal Shock Resistance, points 19
18

Alloy Composition


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Aluminum (Al), % 0
90.9 to 95.2
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 10.5 to 12.5
0 to 0.1
Copper (Cu), % 0
3.9 to 5.0
Iron (Fe), % 83.9 to 89.2
0 to 1.0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.5
0.4 to 1.2
Nickel (Ni), % 0.3 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.5 to 1.2
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