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AISI 431 Stainless Steel vs. EN AC-46200 Aluminum

AISI 431 stainless steel belongs to the iron alloys classification, while EN AC-46200 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 431 stainless steel and the bottom bar is EN AC-46200 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
82
Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 15 to 17
1.1
Fatigue Strength, MPa 430 to 610
87
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
210
Tensile Strength: Yield (Proof), MPa 710 to 1040
130

Thermal Properties

Latent Heat of Fusion, J/g 280
510
Maximum Temperature: Mechanical, °C 850
170
Melting Completion (Liquidus), °C 1510
620
Melting Onset (Solidus), °C 1450
540
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 26
110
Thermal Expansion, µm/m-K 12
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
28
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
88

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
10
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 2.2
7.7
Embodied Energy, MJ/kg 31
140
Embodied Water, L/kg 120
1060

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
2.0
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 32 to 50
21
Strength to Weight: Bending, points 27 to 36
28
Thermal Diffusivity, mm2/s 7.0
44
Thermal Shock Resistance, points 28 to 43
9.5

Alloy Composition

Aluminum (Al), % 0
82.6 to 90.3
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 0
2.0 to 3.5
Iron (Fe), % 78.2 to 83.8
0 to 0.8
Lead (Pb), % 0
0 to 0.25
Magnesium (Mg), % 0
0.050 to 0.55
Manganese (Mn), % 0 to 1.0
0.15 to 0.65
Nickel (Ni), % 1.3 to 2.5
0 to 0.35
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
7.5 to 9.5
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 1.2
Residuals, % 0
0 to 0.25