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S32550 Stainless Steel vs. 5657 Aluminum

S32550 stainless steel belongs to the iron alloys classification, while 5657 aluminum belongs to the aluminum alloys. There are 31 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 S32550 stainless steel and the bottom bar is 5657 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
40 to 50
Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 21
6.6 to 15
Fatigue Strength, MPa 400
74 to 88
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
26
Shear Strength, MPa 540
92 to 110
Tensile Strength: Ultimate (UTS), MPa 860
150 to 200
Tensile Strength: Yield (Proof), MPa 620
140 to 170

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1100
180
Melting Completion (Liquidus), °C 1440
660
Melting Onset (Solidus), °C 1390
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 16
210
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
54
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
180

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
8.4
Embodied Energy, MJ/kg 53
160
Embodied Water, L/kg 180
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
9.7 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 940
140 to 200
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 31
15 to 20
Strength to Weight: Bending, points 26
23 to 28
Thermal Diffusivity, mm2/s 4.4
84
Thermal Shock Resistance, points 23
6.7 to 8.6

Alloy Composition

Aluminum (Al), % 0
98.5 to 99.4
Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 24 to 27
0
Copper (Cu), % 1.5 to 2.5
0 to 0.1
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 57.2 to 67
0 to 0.1
Magnesium (Mg), % 0
0.6 to 1.0
Manganese (Mn), % 0 to 1.5
0 to 0.030
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 0.080
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.050