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2025 Aluminum vs. EN 1.4034 Stainless Steel

2025 aluminum belongs to the aluminum alloys classification, while EN 1.4034 stainless steel belongs to the iron alloys. There are 30 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 1.4034 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 15
11 to 14
Fatigue Strength, MPa 130
230 to 400
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 240
420 to 540
Tensile Strength: Ultimate (UTS), MPa 400
690 to 900
Tensile Strength: Yield (Proof), MPa 260
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 190
770
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 520
1390
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
30
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 120
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.0
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 7.9
2.0
Embodied Energy, MJ/kg 150
27
Embodied Water, L/kg 1130
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
81 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 450
400 to 1370
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 37
25 to 32
Strength to Weight: Bending, points 40
22 to 27
Thermal Diffusivity, mm2/s 58
8.1
Thermal Shock Resistance, points 18
24 to 32

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0.43 to 0.5
Chromium (Cr), % 0 to 0.1
12.5 to 14.5
Copper (Cu), % 3.9 to 5.0
0
Iron (Fe), % 0 to 1.0
83 to 87.1
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.2
0 to 1.0
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