In this post I'll talk about AISI 439. First let's describe it and then have a look at its material's properties.
What is AISI 439?AISI 439 is a titanium-stabilized ferritic steel with improved corrosion resistance, formability, and weldability.
ApplicationAutomotive exhaust systems. Sugar industry equipment. Household appliances.
Ok let's start with AISI 439 Chemical Composition.
C, Carbon max.0.030
Mn, Manganese max.1.00
P, Phosphorus max.0.040
S, Sulfur max.0.030
Si, Silicon max.1.00
Ni, Nickel max.0.50
Learn more about Chemical Composition.
Now it's the mechanical properties turn:
Yield Strength205 MPa
Learn more about Yield Strength.
Tensile Strength415 MPa
Learn more about Tensile Strength.
Elongation (min.)22 %.
Learn more about Elongation.
Learn more about Hardness.
Density7.7 g/cm3, 7700 kg/m3.
Learn more about Density.
Elastic Modulus200 GPa.
Learn more about Elastic Modulus.
Learn more about Poisson's ratio.
Allowable Stress or Factor of SafetyDepends on the project (And its factor of safety).
Learn more about Allowable Stress or Factor of Safety.
AISI Ranking Research (Stainless Steel)While engineers will often look for the cheapest material they can use, I took a different approach to material's selection to help newbie students.
I ranked materials according to their yield strengths and AISI 439 currently ranks 70 in my yield strength index. This means there are other 69 materials that are more resistant.
Note: I've analysed 77 materials in order to create an yield strength index. Check my material's comparison post for more details.
AISI ClassroomAre you having trouble understanding the basics of AISI?
What is AISI: Classification and specification?
This video will walk you through:
ReferencesASTM A240 and other references.
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Luz, Gelson. AISI 439 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. URL
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