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2025 Aluminum vs. EN 1.4469 Stainless Steel

2025 aluminum belongs to the aluminum alloys classification, while EN 1.4469 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 2025 aluminum and the bottom bar is EN 1.4469 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
210
Elongation at Break, % 15
25
Fatigue Strength, MPa 130
380
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 400
740
Tensile Strength: Yield (Proof), MPa 260
550

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 520
1400
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
17
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
21
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 7.9
4.1
Embodied Energy, MJ/kg 150
57
Embodied Water, L/kg 1130
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
170
Resilience: Unit (Modulus of Resilience), kJ/m3 450
730
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 37
26
Strength to Weight: Bending, points 40
23
Thermal Diffusivity, mm2/s 58
4.6
Thermal Shock Resistance, points 18
20

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
25 to 27
Copper (Cu), % 3.9 to 5.0
0 to 1.3
Iron (Fe), % 0 to 1.0
56.4 to 65.9
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0 to 1.0
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.12 to 0.22
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.5 to 1.2
0 to 1.0
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0