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6065 Aluminum vs. EN 1.3955 Stainless Steel

6065 aluminum belongs to the aluminum alloys classification, while EN 1.3955 stainless steel belongs to the iron alloys. There are 29 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 6065 aluminum and the bottom bar is EN 1.3955 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 4.5 to 11
23
Fatigue Strength, MPa 96 to 110
150
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 310 to 400
520
Tensile Strength: Yield (Proof), MPa 270 to 380
220

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 180
930
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 590
1380
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 170
15
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
16
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 8.4
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1200
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 34
95
Resilience: Unit (Modulus of Resilience), kJ/m3 540 to 1040
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 31 to 40
18
Strength to Weight: Bending, points 36 to 43
18
Thermal Diffusivity, mm2/s 67
4.1
Thermal Shock Resistance, points 14 to 18
15

Alloy Composition

Aluminum (Al), % 94.4 to 98.2
0
Bismuth (Bi), % 0.5 to 1.5
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.15
16.5 to 18.5
Copper (Cu), % 0.15 to 0.4
0
Iron (Fe), % 0 to 0.7
65.5 to 73.5
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0.8 to 1.2
0
Manganese (Mn), % 0 to 0.15
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0
10 to 12
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0.4 to 0.8
0 to 1.0
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