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EN 1.4525 Stainless Steel vs. 2025 Aluminum

EN 1.4525 stainless steel belongs to the iron alloys classification, while 2025 aluminum belongs to the aluminum alloys. There are 29 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 EN 1.4525 stainless steel and the bottom bar is 2025 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 5.6 to 13
15
Fatigue Strength, MPa 480 to 540
130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
27
Tensile Strength: Ultimate (UTS), MPa 1030 to 1250
400
Tensile Strength: Yield (Proof), MPa 840 to 1120
260

Thermal Properties

Latent Heat of Fusion, J/g 280
400
Maximum Temperature: Mechanical, °C 860
190
Melting Completion (Liquidus), °C 1430
640
Melting Onset (Solidus), °C 1390
520
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 18
150
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
120

Otherwise Unclassified Properties

Base Metal Price, % relative 13
10
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 2.8
7.9
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 130
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 68 to 130
55
Resilience: Unit (Modulus of Resilience), kJ/m3 1820 to 3230
450
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 36 to 45
37
Strength to Weight: Bending, points 29 to 33
40
Thermal Diffusivity, mm2/s 4.7
58
Thermal Shock Resistance, points 34 to 41
18

Alloy Composition

Aluminum (Al), % 0
90.9 to 95.2
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 15 to 17
0 to 0.1
Copper (Cu), % 2.5 to 4.0
3.9 to 5.0
Iron (Fe), % 70.4 to 79
0 to 1.0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0.4 to 1.2
Molybdenum (Mo), % 0 to 0.8
0
Nickel (Ni), % 3.5 to 5.5
0
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.8
0.5 to 1.2
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15