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6063A Aluminum vs. S44700 Stainless Steel

6063A aluminum belongs to the aluminum alloys classification, while S44700 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, 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 6063A aluminum and the bottom bar is S44700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
210
Elongation at Break, % 6.7 to 18
23
Fatigue Strength, MPa 53 to 80
300
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
82
Shear Strength, MPa 78 to 150
380
Tensile Strength: Ultimate (UTS), MPa 130 to 260
600
Tensile Strength: Yield (Proof), MPa 55 to 200
450

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 620
1410
Specific Heat Capacity, J/kg-K 900
480
Thermal Expansion, µm/m-K 23
11

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
18
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
3.6
Embodied Energy, MJ/kg 150
49
Embodied Water, L/kg 1190
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 21
120
Resilience: Unit (Modulus of Resilience), kJ/m3 22 to 280
480
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 13 to 26
21
Strength to Weight: Bending, points 21 to 33
20
Thermal Shock Resistance, points 5.6 to 11
19

Alloy Composition

Aluminum (Al), % 97.5 to 99
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0 to 0.050
28 to 30
Copper (Cu), % 0 to 0.1
0 to 0.15
Iron (Fe), % 0.15 to 0.35
64.9 to 68.5
Magnesium (Mg), % 0.6 to 0.9
0
Manganese (Mn), % 0 to 0.15
0 to 0.3
Molybdenum (Mo), % 0
3.5 to 4.2
Nickel (Ni), % 0
0 to 0.15
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0.3 to 0.6
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0