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EN AC-44000 Aluminum vs. AISI 440B Stainless Steel

EN AC-44000 aluminum belongs to the aluminum alloys classification, while AISI 440B stainless steel belongs to the iron alloys. There are 28 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 EN AC-44000 aluminum and the bottom bar is AISI 440B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 7.3
3.0 to 18
Fatigue Strength, MPa 64
260 to 850
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 180
740 to 1930
Tensile Strength: Yield (Proof), MPa 86
430 to 1860

Thermal Properties

Latent Heat of Fusion, J/g 560
280
Maximum Temperature: Mechanical, °C 170
870
Melting Completion (Liquidus), °C 590
1480
Melting Onset (Solidus), °C 590
1370
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 140
23
Thermal Expansion, µm/m-K 21
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 2.5
7.7
Embodied Carbon, kg CO2/kg material 7.8
2.2
Embodied Energy, MJ/kg 150
31
Embodied Water, L/kg 1070
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
57 to 110
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 55
25
Strength to Weight: Axial, points 20
27 to 70
Strength to Weight: Bending, points 28
24 to 45
Thermal Diffusivity, mm2/s 61
6.1
Thermal Shock Resistance, points 8.4
27 to 70

Alloy Composition


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Aluminum (Al), % 87.1 to 90
0
Carbon (C), % 0
0.75 to 1.0
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.19
78.2 to 83.3
Magnesium (Mg), % 0 to 0.45
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 10 to 11.8
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0