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A444.0 Aluminum vs. S41050 Stainless Steel

A444.0 aluminum belongs to the aluminum alloys classification, while S41050 stainless steel belongs to the iron alloys. There are 29 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 A444.0 aluminum and the bottom bar is S41050 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 18
25
Fatigue Strength, MPa 37
160
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Tensile Strength: Ultimate (UTS), MPa 160
470
Tensile Strength: Yield (Proof), MPa 66
230

Thermal Properties

Latent Heat of Fusion, J/g 500
270
Maximum Temperature: Mechanical, °C 170
720
Melting Completion (Liquidus), °C 630
1440
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
27
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.0
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 7.9
1.9
Embodied Energy, MJ/kg 150
27
Embodied Water, L/kg 1110
97

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24
98
Resilience: Unit (Modulus of Resilience), kJ/m3 31
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 25
17
Thermal Diffusivity, mm2/s 68
7.2
Thermal Shock Resistance, points 7.3
17

Alloy Composition

Aluminum (Al), % 91.6 to 93.5
0
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
10.5 to 12.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.2
84.2 to 88.9
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Nickel (Ni), % 0
0.6 to 1.1
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 6.5 to 7.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0