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AISI 439 Stainless Steel vs. 324.0 Aluminum

AISI 439 stainless steel belongs to the iron alloys classification, while 324.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, 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 439 stainless steel and the bottom bar is 324.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 23
3.0 to 4.0
Fatigue Strength, MPa 170
77 to 89
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 490
210 to 310
Tensile Strength: Yield (Proof), MPa 250
110 to 270

Thermal Properties

Latent Heat of Fusion, J/g 280
500
Maximum Temperature: Mechanical, °C 890
170
Melting Completion (Liquidus), °C 1510
610
Melting Onset (Solidus), °C 1430
550
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 25
150
Thermal Expansion, µm/m-K 11
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
34
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.3
7.9
Embodied Energy, MJ/kg 34
150
Embodied Water, L/kg 120
1090

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
6.8 to 8.9
Resilience: Unit (Modulus of Resilience), kJ/m3 160
85 to 510
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 18
22 to 32
Strength to Weight: Bending, points 18
29 to 38
Thermal Diffusivity, mm2/s 6.7
62
Thermal Shock Resistance, points 16
9.7 to 14

Alloy Composition

Aluminum (Al), % 0 to 0.15
87.3 to 92.2
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
0.4 to 0.6
Iron (Fe), % 77.1 to 82.8
0 to 1.2
Magnesium (Mg), % 0
0.4 to 0.7
Manganese (Mn), % 0 to 1.0
0 to 0.5
Nickel (Ni), % 0 to 0.5
0 to 0.3
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
7.0 to 8.0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.2 to 1.1
0 to 0.2
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.2