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6063 Aluminum vs. EN 1.4509 Stainless Steel

6063 aluminum belongs to the aluminum alloys classification, while EN 1.4509 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 6063 aluminum and the bottom bar is EN 1.4509 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 25 to 95
180
Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 7.3 to 21
21
Fatigue Strength, MPa 39 to 95
170
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 70 to 190
330
Tensile Strength: Ultimate (UTS), MPa 110 to 300
530
Tensile Strength: Yield (Proof), MPa 49 to 270
260

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Maximum Temperature: Mechanical, °C 160
890
Melting Completion (Liquidus), °C 650
1440
Melting Onset (Solidus), °C 620
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 190 to 220
25
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 49 to 58
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 160 to 190
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
41
Embodied Water, L/kg 1190
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 27
90
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 540
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 11 to 31
19
Strength to Weight: Bending, points 18 to 37
19
Thermal Diffusivity, mm2/s 79 to 89
6.8
Thermal Shock Resistance, points 4.8 to 13
19

Alloy Composition

Aluminum (Al), % 97.5 to 99.4
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
17.5 to 18.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.35
77.8 to 82.1
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Niobium (Nb), % 0
0.3 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 0.6
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.1
0.1 to 0.6
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0