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S32550 Stainless Steel vs. 5070 Aluminum

S32550 stainless steel belongs to the iron alloys classification, while 5070 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 S32550 stainless steel and the bottom bar is 5070 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 21
20
Fatigue Strength, MPa 400
150
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
26
Shear Strength, MPa 540
190
Tensile Strength: Ultimate (UTS), MPa 860
300
Tensile Strength: Yield (Proof), MPa 620
140

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1390
550
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 16
130
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
31
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
100

Otherwise Unclassified Properties

Base Metal Price, % relative 20
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 3.8
8.8
Embodied Energy, MJ/kg 53
150
Embodied Water, L/kg 180
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
51
Resilience: Unit (Modulus of Resilience), kJ/m3 940
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 31
31
Strength to Weight: Bending, points 26
37
Thermal Diffusivity, mm2/s 4.4
53
Thermal Shock Resistance, points 23
14

Alloy Composition

Aluminum (Al), % 0
92.4 to 95.7
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 24 to 27
0 to 0.3
Copper (Cu), % 1.5 to 2.5
0 to 0.25
Iron (Fe), % 57.2 to 67
0 to 0.4
Magnesium (Mg), % 0
3.5 to 4.5
Manganese (Mn), % 0 to 1.5
0.4 to 0.8
Molybdenum (Mo), % 2.9 to 3.9
0
Nickel (Ni), % 4.5 to 6.5
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.25
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0.4 to 0.8
Residuals, % 0
0 to 0.15