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AISI 440B Stainless Steel vs. EN AC-44400 Aluminum

AISI 440B stainless steel belongs to the iron alloys classification, while EN AC-44400 aluminum belongs to the aluminum 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 AISI 440B stainless steel and the bottom bar is EN AC-44400 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 3.0 to 18
4.1
Fatigue Strength, MPa 260 to 850
79
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
210
Tensile Strength: Yield (Proof), MPa 430 to 1860
110

Thermal Properties

Latent Heat of Fusion, J/g 280
540
Maximum Temperature: Mechanical, °C 870
170
Melting Completion (Liquidus), °C 1480
600
Melting Onset (Solidus), °C 1370
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 23
140
Thermal Expansion, µm/m-K 10
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
33
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
9.5
Density, g/cm3 7.7
2.6
Embodied Carbon, kg CO2/kg material 2.2
7.8
Embodied Energy, MJ/kg 31
150
Embodied Water, L/kg 120
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57 to 110
7.3
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
54
Strength to Weight: Axial, points 27 to 70
23
Strength to Weight: Bending, points 24 to 45
31
Thermal Diffusivity, mm2/s 6.1
60
Thermal Shock Resistance, points 27 to 70
9.8

Alloy Composition

Aluminum (Al), % 0
87.1 to 92
Carbon (C), % 0.75 to 1.0
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 78.2 to 83.3
0 to 0.65
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
8.0 to 11
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15