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AISI 440A Stainless Steel vs. 6065 Aluminum

AISI 440A stainless steel belongs to the iron alloys classification, while 6065 aluminum belongs to the aluminum alloys. There are 29 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 440A stainless steel and the bottom bar is 6065 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 5.0 to 20
4.5 to 11
Fatigue Strength, MPa 270 to 790
96 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 450 to 1040
190 to 230
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
310 to 400
Tensile Strength: Yield (Proof), MPa 420 to 1650
270 to 380

Thermal Properties

Latent Heat of Fusion, J/g 280
400
Maximum Temperature: Mechanical, °C 760
180
Melting Completion (Liquidus), °C 1480
640
Melting Onset (Solidus), °C 1370
590
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 23
170
Thermal Expansion, µm/m-K 10
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
43
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
11
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 2.2
8.4
Embodied Energy, MJ/kg 31
150
Embodied Water, L/kg 120
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
17 to 34
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 26 to 65
31 to 40
Strength to Weight: Bending, points 23 to 43
36 to 43
Thermal Diffusivity, mm2/s 6.2
67
Thermal Shock Resistance, points 26 to 65
14 to 18

Alloy Composition

Aluminum (Al), % 0
94.4 to 98.2
Bismuth (Bi), % 0
0.5 to 1.5
Carbon (C), % 0.6 to 0.75
0
Chromium (Cr), % 16 to 18
0 to 0.15
Copper (Cu), % 0
0.15 to 0.4
Iron (Fe), % 78.4 to 83.4
0 to 0.7
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 0 to 1.0
0 to 0.15
Molybdenum (Mo), % 0 to 0.75
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.4 to 0.8
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0 to 0.15
Residuals, % 0
0 to 0.15