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6023 Aluminum vs. AISI 420 Stainless Steel

6023 aluminum belongs to the aluminum alloys classification, while AISI 420 stainless steel belongs to the iron alloys. There are 30 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 6023 aluminum and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 11
8.0 to 15
Fatigue Strength, MPa 120 to 130
220 to 670
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Shear Strength, MPa 210 to 220
420 to 1010
Tensile Strength: Ultimate (UTS), MPa 360
690 to 1720
Tensile Strength: Yield (Proof), MPa 300 to 310
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Maximum Temperature: Mechanical, °C 160
620
Melting Completion (Liquidus), °C 640
1510
Melting Onset (Solidus), °C 580
1450
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 170
27
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 45
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
7.5
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1180
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 39
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 670 to 690
380 to 4410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 35 to 36
25 to 62
Strength to Weight: Bending, points 40
22 to 41
Thermal Diffusivity, mm2/s 67
7.3
Thermal Shock Resistance, points 16
25 to 62

Alloy Composition

Aluminum (Al), % 94 to 97.7
0
Bismuth (Bi), % 0.3 to 0.8
0
Carbon (C), % 0
0.15 to 0.4
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0.2 to 0.5
0
Iron (Fe), % 0 to 0.5
82.3 to 87.9
Magnesium (Mg), % 0.4 to 0.9
0
Manganese (Mn), % 0.2 to 0.6
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0 to 0.75
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.6 to 1.4
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0.6 to 1.2
0
Residuals, % 0 to 0.15
0