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AISI 329 Stainless Steel vs. 5657 Aluminum

AISI 329 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 (3, 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 329 stainless steel and the bottom bar is 5657 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
40 to 50
Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 17
6.6 to 15
Fatigue Strength, MPa 330
74 to 88
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
26
Shear Strength, MPa 440
92 to 110
Tensile Strength: Ultimate (UTS), MPa 710
150 to 200
Tensile Strength: Yield (Proof), MPa 540
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 2.0
54
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
180

Otherwise Unclassified Properties

Base Metal Price, % relative 16
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 3.1
8.4
Embodied Energy, MJ/kg 44
160
Embodied Water, L/kg 170
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
9.7 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 730
140 to 200
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 25
15 to 20
Strength to Weight: Bending, points 23
23 to 28
Thermal Diffusivity, mm2/s 4.3
84
Thermal Shock Resistance, points 19
6.7 to 8.6

Alloy Composition

Aluminum (Al), % 0
98.5 to 99.4
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 23 to 28
0
Copper (Cu), % 0
0 to 0.1
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 63.1 to 74
0 to 0.1
Magnesium (Mg), % 0
0.6 to 1.0
Manganese (Mn), % 0 to 1.0
0 to 0.030
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 2.0 to 5.0
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.75
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