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N08801 Stainless Steel vs. 5449 Aluminum

N08801 stainless steel belongs to the iron alloys classification, while 5449 aluminum belongs to the aluminum alloys. There are 30 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 N08801 stainless steel and the bottom bar is 5449 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 34
4.0 to 17
Fatigue Strength, MPa 260
78 to 120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 570
130 to 190
Tensile Strength: Ultimate (UTS), MPa 860
210 to 330
Tensile Strength: Yield (Proof), MPa 190
91 to 260

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1090
190
Melting Completion (Liquidus), °C 1390
650
Melting Onset (Solidus), °C 1360
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 12
140
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
35
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
110

Otherwise Unclassified Properties

Base Metal Price, % relative 30
9.5
Density, g/cm3 8.0
2.8
Embodied Carbon, kg CO2/kg material 5.5
8.5
Embodied Energy, MJ/kg 79
150
Embodied Water, L/kg 200
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
12 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 92
60 to 480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 30
22 to 33
Strength to Weight: Bending, points 25
29 to 39
Thermal Diffusivity, mm2/s 3.3
56
Thermal Shock Resistance, points 20
9.4 to 15

Alloy Composition

Aluminum (Al), % 0
94.1 to 97.8
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 19 to 22
0 to 0.3
Copper (Cu), % 0 to 0.5
0 to 0.3
Iron (Fe), % 39.5 to 50.3
0 to 0.7
Magnesium (Mg), % 0
1.6 to 2.6
Manganese (Mn), % 0 to 1.5
0.6 to 1.1
Nickel (Ni), % 30 to 34
0
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0.75 to 1.5
0 to 0.1
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.15