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6065 Aluminum vs. S35500 Stainless Steel

6065 aluminum belongs to the aluminum alloys classification, while S35500 stainless steel belongs to the iron alloys. There are 30 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 6065 aluminum and the bottom bar is S35500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 4.5 to 11
14
Fatigue Strength, MPa 96 to 110
690 to 730
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Shear Strength, MPa 190 to 230
810 to 910
Tensile Strength: Ultimate (UTS), MPa 310 to 400
1330 to 1490
Tensile Strength: Yield (Proof), MPa 270 to 380
1200 to 1280

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Maximum Temperature: Mechanical, °C 180
870
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 890
470
Thermal Conductivity, W/m-K 170
16
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
16
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 8.4
3.5
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1200
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 34
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 540 to 1040
3610 to 4100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 31 to 40
47 to 53
Strength to Weight: Bending, points 36 to 43
34 to 37
Thermal Diffusivity, mm2/s 67
4.4
Thermal Shock Resistance, points 14 to 18
44 to 49

Alloy Composition

Aluminum (Al), % 94.4 to 98.2
0
Bismuth (Bi), % 0.5 to 1.5
0
Carbon (C), % 0
0.1 to 0.15
Chromium (Cr), % 0 to 0.15
15 to 16
Copper (Cu), % 0.15 to 0.4
0
Iron (Fe), % 0 to 0.7
73.2 to 77.7
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0.8 to 1.2
0
Manganese (Mn), % 0 to 0.15
0.5 to 1.3
Molybdenum (Mo), % 0
2.5 to 3.2
Nickel (Ni), % 0
4.0 to 5.0
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0.070 to 0.13
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.4 to 0.8
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.15
0
Residuals, % 0 to 0.15
0

Comparable Variants