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A444.0 Aluminum vs. S42300 Stainless Steel

A444.0 aluminum belongs to the aluminum alloys classification, while S42300 stainless steel belongs to the iron alloys. There are 29 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 A444.0 aluminum and the bottom bar is S42300 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 18
9.1
Fatigue Strength, MPa 37
440
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 160
1100
Tensile Strength: Yield (Proof), MPa 66
850

Thermal Properties

Latent Heat of Fusion, J/g 500
270
Maximum Temperature: Mechanical, °C 170
750
Melting Completion (Liquidus), °C 630
1470
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 160
25
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
4.5
Electrical Conductivity: Equal Weight (Specific), % IACS 140
5.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 7.9
3.2
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1110
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24
93
Resilience: Unit (Modulus of Resilience), kJ/m3 31
1840
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 17
39
Strength to Weight: Bending, points 25
30
Thermal Diffusivity, mm2/s 68
6.8
Thermal Shock Resistance, points 7.3
40

Alloy Composition

Aluminum (Al), % 91.6 to 93.5
0
Carbon (C), % 0
0.27 to 0.32
Chromium (Cr), % 0
11 to 12
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.2
82 to 85.1
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.1
1.0 to 1.4
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 6.5 to 7.5
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.2
0
Vanadium (V), % 0
0.2 to 0.3
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0