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AISI 440A Stainless Steel vs. EN AC-45000 Aluminum

AISI 440A stainless steel belongs to the iron alloys classification, while EN AC-45000 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 440A stainless steel and the bottom bar is EN AC-45000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 5.0 to 20
1.1
Fatigue Strength, MPa 270 to 790
75
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
180
Tensile Strength: Yield (Proof), MPa 420 to 1650
110

Thermal Properties

Latent Heat of Fusion, J/g 280
470
Maximum Temperature: Mechanical, °C 760
180
Melting Completion (Liquidus), °C 1480
640
Melting Onset (Solidus), °C 1370
520
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 23
120
Thermal Expansion, µm/m-K 10
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
81

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
11
Density, g/cm3 7.7
3.0
Embodied Carbon, kg CO2/kg material 2.2
7.7
Embodied Energy, MJ/kg 31
140
Embodied Water, L/kg 120
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
1.7
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 26 to 65
17
Strength to Weight: Bending, points 23 to 43
24
Thermal Diffusivity, mm2/s 6.2
47
Thermal Shock Resistance, points 26 to 65
8.0

Alloy Composition

Aluminum (Al), % 0
82.2 to 91.8
Carbon (C), % 0.6 to 0.75
0
Chromium (Cr), % 16 to 18
0 to 0.15
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 78.4 to 83.4
0 to 1.0
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 0
0 to 0.55
Manganese (Mn), % 0 to 1.0
0.2 to 0.65
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
0 to 0.45
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
5.0 to 7.0
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 2.0
Residuals, % 0
0 to 0.35