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C355.0 Aluminum vs. S44800 Stainless Steel

C355.0 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 (6, 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 C355.0 aluminum and the bottom bar is S44800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 86 to 90
190
Elastic (Young's, Tensile) Modulus, GPa 70
210
Elongation at Break, % 2.7 to 3.8
23
Fatigue Strength, MPa 76 to 84
300
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
82
Tensile Strength: Ultimate (UTS), MPa 290 to 310
590
Tensile Strength: Yield (Proof), MPa 200 to 230
450

Thermal Properties

Latent Heat of Fusion, J/g 470
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 570
1410
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 150
17
Thermal Expansion, µm/m-K 22
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 130
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 8.0
3.8
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 1120
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.5 to 9.8
120
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 380
480
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 51
25
Strength to Weight: Axial, points 30 to 32
21
Strength to Weight: Bending, points 36 to 37
20
Thermal Diffusivity, mm2/s 60
4.6
Thermal Shock Resistance, points 13 to 14
19

Alloy Composition

Aluminum (Al), % 91.7 to 94.1
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
28 to 30
Copper (Cu), % 1.0 to 1.5
0 to 0.15
Iron (Fe), % 0 to 0.2
62.6 to 66.5
Magnesium (Mg), % 0.4 to 0.6
0
Manganese (Mn), % 0 to 0.1
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), % 4.5 to 5.5
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0