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4006 Aluminum vs. AISI 329 Stainless Steel

4006 aluminum belongs to the aluminum alloys classification, while AISI 329 stainless steel belongs to the iron 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 4006 aluminum and the bottom bar is AISI 329 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 28 to 45
240
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 3.4 to 24
17
Fatigue Strength, MPa 35 to 110
330
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
80
Shear Strength, MPa 70 to 91
440
Tensile Strength: Ultimate (UTS), MPa 110 to 160
710
Tensile Strength: Yield (Proof), MPa 62 to 140
540

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 620
1390
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 220
16
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 180
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
16
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.1
3.1
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1180
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.1 to 26
110
Resilience: Unit (Modulus of Resilience), kJ/m3 28 to 130
730
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 11 to 16
25
Strength to Weight: Bending, points 19 to 24
23
Thermal Diffusivity, mm2/s 89
4.3
Thermal Shock Resistance, points 4.9 to 7.0
19

Alloy Composition

Aluminum (Al), % 97.4 to 98.7
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.2
23 to 28
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0.5 to 0.8
63.1 to 74
Magnesium (Mg), % 0 to 0.010
0
Manganese (Mn), % 0 to 0.050
0 to 1.0
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0
2.0 to 5.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.8 to 1.2
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.050
0
Residuals, % 0 to 0.15
0