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AISI 440B Stainless Steel vs. EN AC-42100 Aluminum

AISI 440B stainless steel belongs to the iron alloys classification, while EN AC-42100 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-42100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 3.0 to 18
3.4 to 9.0
Fatigue Strength, MPa 260 to 850
76 to 82
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
280 to 290
Tensile Strength: Yield (Proof), MPa 430 to 1860
210 to 230

Thermal Properties

Latent Heat of Fusion, J/g 280
500
Maximum Temperature: Mechanical, °C 870
170
Melting Completion (Liquidus), °C 1480
610
Melting Onset (Solidus), °C 1370
600
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 23
150
Thermal Expansion, µm/m-K 10
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
41
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
140

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
8.0
Embodied Energy, MJ/kg 31
150
Embodied Water, L/kg 120
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57 to 110
9.1 to 23
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 27 to 70
30 to 31
Strength to Weight: Bending, points 24 to 45
37 to 38
Thermal Diffusivity, mm2/s 6.1
66
Thermal Shock Resistance, points 27 to 70
13

Alloy Composition

Aluminum (Al), % 0
91.3 to 93.3
Carbon (C), % 0.75 to 1.0
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 78.2 to 83.3
0 to 0.19
Magnesium (Mg), % 0
0.25 to 0.45
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 0 to 0.75
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
6.5 to 7.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.070
Residuals, % 0
0 to 0.1