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6463 Aluminum vs. AISI 309 Stainless Steel

6463 aluminum belongs to the aluminum alloys classification, while AISI 309 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 6463 aluminum and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 42 to 74
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 9.0 to 17
34 to 47
Fatigue Strength, MPa 45 to 76
250 to 280
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
78
Shear Strength, MPa 86 to 150
420 to 470
Tensile Strength: Ultimate (UTS), MPa 140 to 230
600 to 710
Tensile Strength: Yield (Proof), MPa 82 to 200
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 160
980
Melting Completion (Liquidus), °C 660
1450
Melting Onset (Solidus), °C 620
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 190 to 210
16
Thermal Expansion, µm/m-K 23
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 50 to 55
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 170 to 180
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
19
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
3.6
Embodied Energy, MJ/kg 150
51
Embodied Water, L/kg 1190
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 25
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 300
170 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 14 to 24
21 to 25
Strength to Weight: Bending, points 22 to 31
20 to 23
Thermal Diffusivity, mm2/s 79 to 86
4.3
Thermal Shock Resistance, points 6.3 to 10
14 to 16

Alloy Composition

Aluminum (Al), % 97.9 to 99.4
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
22 to 24
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.15
58 to 66
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.050
0 to 2.0
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0.2 to 0.6
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.050
0
Residuals, % 0 to 0.15
0