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2025 Aluminum vs. S32615 Stainless Steel

2025 aluminum belongs to the aluminum alloys classification, while S32615 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 S32615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
170
Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 15
28
Fatigue Strength, MPa 130
180
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
75
Shear Strength, MPa 240
400
Tensile Strength: Ultimate (UTS), MPa 400
620
Tensile Strength: Yield (Proof), MPa 260
250

Thermal Properties

Latent Heat of Fusion, J/g 400
370
Maximum Temperature: Mechanical, °C 190
990
Melting Completion (Liquidus), °C 640
1350
Melting Onset (Solidus), °C 520
1310
Specific Heat Capacity, J/kg-K 870
500
Thermal Expansion, µm/m-K 23
15

Otherwise Unclassified Properties

Base Metal Price, % relative 10
24
Density, g/cm3 3.0
7.6
Embodied Carbon, kg CO2/kg material 7.9
4.4
Embodied Energy, MJ/kg 150
63
Embodied Water, L/kg 1130
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
140
Resilience: Unit (Modulus of Resilience), kJ/m3 450
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 37
23
Strength to Weight: Bending, points 40
21
Thermal Shock Resistance, points 18
15

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0 to 0.1
16.5 to 19.5
Copper (Cu), % 3.9 to 5.0
1.5 to 2.5
Iron (Fe), % 0 to 1.0
46.4 to 57.9
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0 to 2.0
Molybdenum (Mo), % 0
0.3 to 1.5
Nickel (Ni), % 0
19 to 22
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0.5 to 1.2
4.8 to 6.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0