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S44700 Stainless Steel vs. B390.0 Aluminum

S44700 stainless steel belongs to the iron alloys classification, while B390.0 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, 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 S44700 stainless steel and the bottom bar is B390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
76
Elongation at Break, % 23
0.88
Fatigue Strength, MPa 300
170
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 82
29
Tensile Strength: Ultimate (UTS), MPa 600
320
Tensile Strength: Yield (Proof), MPa 450
250

Thermal Properties

Latent Heat of Fusion, J/g 300
640
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
580
Melting Onset (Solidus), °C 1410
580
Specific Heat Capacity, J/kg-K 480
880
Thermal Expansion, µm/m-K 11
20

Otherwise Unclassified Properties

Base Metal Price, % relative 18
11
Density, g/cm3 7.8
2.8
Embodied Carbon, kg CO2/kg material 3.6
7.3
Embodied Energy, MJ/kg 49
130
Embodied Water, L/kg 180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 480
410
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 21
32
Strength to Weight: Bending, points 20
38
Thermal Shock Resistance, points 19
15

Alloy Composition

Aluminum (Al), % 0
72.7 to 79.6
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 28 to 30
0
Copper (Cu), % 0 to 0.15
4.0 to 5.0
Iron (Fe), % 64.9 to 68.5
0 to 1.3
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 0 to 0.3
0 to 0.5
Molybdenum (Mo), % 3.5 to 4.2
0
Nickel (Ni), % 0 to 0.15
0 to 0.1
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.2
16 to 18
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 1.5
Residuals, % 0
0 to 0.2