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6101A Aluminum vs. S44800 Stainless Steel

6101A aluminum belongs to the aluminum alloys classification, while S44800 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 6101A aluminum and the bottom bar is S44800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
210
Elongation at Break, % 11
23
Fatigue Strength, MPa 80
300
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
82
Shear Strength, MPa 130
370
Tensile Strength: Ultimate (UTS), MPa 220
590
Tensile Strength: Yield (Proof), MPa 190
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 630
1410
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 200
17
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 55
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 180
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
19
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
3.8
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 1190
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24
120
Resilience: Unit (Modulus of Resilience), kJ/m3 280
480
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 51
25
Strength to Weight: Axial, points 23
21
Strength to Weight: Bending, points 30
20
Thermal Diffusivity, mm2/s 84
4.6
Thermal Shock Resistance, points 10
19

Alloy Composition

Aluminum (Al), % 97.9 to 99.3
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
28 to 30
Copper (Cu), % 0 to 0.050
0 to 0.15
Iron (Fe), % 0 to 0.4
62.6 to 66.5
Magnesium (Mg), % 0.4 to 0.9
0
Manganese (Mn), % 0
0 to 0.3
Molybdenum (Mo), % 0
3.5 to 4.2
Nickel (Ni), % 0
2.0 to 2.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0.3 to 0.7
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Residuals, % 0 to 0.1
0