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2025 Aluminum vs. EN 1.4477 Stainless Steel

2025 aluminum belongs to the aluminum alloys classification, while EN 1.4477 stainless steel belongs to the iron 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 2025 aluminum and the bottom bar is EN 1.4477 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
270
Elastic (Young's, Tensile) Modulus, GPa 72
210
Elongation at Break, % 15
22 to 23
Fatigue Strength, MPa 130
420 to 490
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
81
Shear Strength, MPa 240
550 to 580
Tensile Strength: Ultimate (UTS), MPa 400
880 to 930
Tensile Strength: Yield (Proof), MPa 260
620 to 730

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 520
1380
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
13
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
20
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 7.9
3.7
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 1130
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 450
940 to 1290
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 37
31 to 33
Strength to Weight: Bending, points 40
26 to 27
Thermal Diffusivity, mm2/s 58
3.5
Thermal Shock Resistance, points 18
23 to 25

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
28 to 30
Copper (Cu), % 3.9 to 5.0
0 to 0.8
Iron (Fe), % 0 to 1.0
56.6 to 63.6
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0.8 to 1.5
Molybdenum (Mo), % 0
1.5 to 2.6
Nickel (Ni), % 0
5.8 to 7.5
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.2
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0