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AISI 441 Stainless Steel vs. 8090 Aluminum

AISI 441 stainless steel belongs to the iron alloys classification, while 8090 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 AISI 441 stainless steel and the bottom bar is 8090 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
67
Elongation at Break, % 23
3.5 to 13
Fatigue Strength, MPa 180
91 to 140
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
25
Tensile Strength: Ultimate (UTS), MPa 470
340 to 490
Tensile Strength: Yield (Proof), MPa 270
210 to 420

Thermal Properties

Latent Heat of Fusion, J/g 280
400
Maximum Temperature: Mechanical, °C 910
190
Melting Completion (Liquidus), °C 1440
660
Melting Onset (Solidus), °C 1400
600
Specific Heat Capacity, J/kg-K 480
960
Thermal Conductivity, W/m-K 23
95 to 160
Thermal Expansion, µm/m-K 10
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
20
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
66

Otherwise Unclassified Properties

Base Metal Price, % relative 13
18
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.8
8.6
Embodied Energy, MJ/kg 41
170
Embodied Water, L/kg 130
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
16 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 190
340 to 1330
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 17
34 to 49
Strength to Weight: Bending, points 17
39 to 50
Thermal Diffusivity, mm2/s 6.1
36 to 60
Thermal Shock Resistance, points 16
15 to 22

Alloy Composition

Aluminum (Al), % 0
93 to 98.4
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 19.5
0 to 0.1
Copper (Cu), % 0
1.0 to 1.6
Iron (Fe), % 76 to 82.2
0 to 0.3
Lithium (Li), % 0
2.2 to 2.7
Magnesium (Mg), % 0
0.6 to 1.3
Manganese (Mn), % 0 to 1.0
0 to 0.1
Nickel (Ni), % 0 to 1.0
0
Niobium (Nb), % 0.3 to 0.9
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.1 to 0.5
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0.040 to 0.16
Residuals, % 0
0 to 0.15