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2025 Aluminum vs. AISI 202 Stainless Steel

2025 aluminum belongs to the aluminum alloys classification, while AISI 202 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 AISI 202 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 15
14 to 45
Fatigue Strength, MPa 130
290 to 330
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 240
490 to 590
Tensile Strength: Ultimate (UTS), MPa 400
700 to 980
Tensile Strength: Yield (Proof), MPa 260
310 to 580

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 190
910
Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 520
1360
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 7.9
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1130
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 450
250 to 840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 37
25 to 35
Strength to Weight: Bending, points 40
23 to 29
Thermal Diffusivity, mm2/s 58
4.0
Thermal Shock Resistance, points 18
15 to 21

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.1
17 to 19
Copper (Cu), % 3.9 to 5.0
0
Iron (Fe), % 0 to 1.0
63.5 to 71.5
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
7.5 to 10
Nickel (Ni), % 0
4.0 to 6.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0.5 to 1.2
0 to 1.0
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