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AISI 409 Stainless Steel vs. A390.0 Aluminum

AISI 409 stainless steel belongs to the iron alloys classification, while A390.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 409 stainless steel and the bottom bar is A390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
75
Elongation at Break, % 24
0.87 to 0.91
Fatigue Strength, MPa 140
70 to 100
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
28
Tensile Strength: Ultimate (UTS), MPa 420
190 to 290
Tensile Strength: Yield (Proof), MPa 200
190 to 290

Thermal Properties

Latent Heat of Fusion, J/g 270
640
Maximum Temperature: Mechanical, °C 710
170
Melting Completion (Liquidus), °C 1450
580
Melting Onset (Solidus), °C 1400
480
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 25
130
Thermal Expansion, µm/m-K 11
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
20
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
67

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
11
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.0
7.3
Embodied Energy, MJ/kg 28
140
Embodied Water, L/kg 94
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
1.6 to 2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 100
240 to 580
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 15
19 to 30
Strength to Weight: Bending, points 16
27 to 36
Thermal Diffusivity, mm2/s 6.7
56
Thermal Shock Resistance, points 15
9.0 to 14

Alloy Composition

Aluminum (Al), % 0
75.3 to 79.6
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 10.5 to 11.7
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 84.9 to 89.5
0 to 0.5
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 0 to 1.0
0 to 0.1
Nickel (Ni), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
16 to 18
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0 to 0.75
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.2