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2025 Aluminum vs. AISI 416 Stainless Steel

2025 aluminum belongs to the aluminum alloys classification, while AISI 416 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 416 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
230 to 320
Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 15
13 to 31
Fatigue Strength, MPa 130
230 to 340
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 240
340 to 480
Tensile Strength: Ultimate (UTS), MPa 400
510 to 800
Tensile Strength: Yield (Proof), MPa 260
290 to 600

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 190
680
Melting Completion (Liquidus), °C 640
1530
Melting Onset (Solidus), °C 520
1480
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
30
Thermal Expansion, µm/m-K 23
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
3.3

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
1.9
Embodied Energy, MJ/kg 150
27
Embodied Water, L/kg 1130
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
98 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 450
220 to 940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 37
18 to 29
Strength to Weight: Bending, points 40
18 to 25
Thermal Diffusivity, mm2/s 58
8.1
Thermal Shock Resistance, points 18
19 to 30

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.1
12 to 14
Copper (Cu), % 3.9 to 5.0
0
Iron (Fe), % 0 to 1.0
83.2 to 87.9
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0 to 1.3
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0.5 to 1.2
0 to 1.0
Sulfur (S), % 0
0.15 to 0.35
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0