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AISI 439 Stainless Steel vs. 392.0 Aluminum

AISI 439 stainless steel belongs to the iron alloys classification, while 392.0 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 392.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
75
Elongation at Break, % 23
0.86
Fatigue Strength, MPa 170
190
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
28
Tensile Strength: Ultimate (UTS), MPa 490
290
Tensile Strength: Yield (Proof), MPa 250
270

Thermal Properties

Latent Heat of Fusion, J/g 280
670
Maximum Temperature: Mechanical, °C 890
170
Melting Completion (Liquidus), °C 1510
670
Melting Onset (Solidus), °C 1430
580
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 25
130
Thermal Expansion, µm/m-K 11
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
25
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
90

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
10
Density, g/cm3 7.7
2.5
Embodied Carbon, kg CO2/kg material 2.3
7.5
Embodied Energy, MJ/kg 34
140
Embodied Water, L/kg 120
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 160
490
Stiffness to Weight: Axial, points 14
17
Stiffness to Weight: Bending, points 25
56
Strength to Weight: Axial, points 18
32
Strength to Weight: Bending, points 18
39
Thermal Diffusivity, mm2/s 6.7
60
Thermal Shock Resistance, points 16
15

Alloy Composition

Aluminum (Al), % 0 to 0.15
73.9 to 80.6
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
0.4 to 0.8
Iron (Fe), % 77.1 to 82.8
0 to 1.5
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 0 to 1.0
0.2 to 0.6
Nickel (Ni), % 0 to 0.5
0 to 0.5
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
18 to 20
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.3
Titanium (Ti), % 0.2 to 1.1
0 to 0.2
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.5