In this post I'll talk about AISI 309H. First let's describe it and then have a look at its material's properties.
What is AISI 309H?AISI 309H has comparable corrosion resistance, superior resistance to oxidation in comparison to common austenitic alloys.
ApplicationHeat treatment industry-conveyor belts, rollers, burner parts, refractory supports, retorts linings, oven linings, fans, tube hangers, baskets, and trays. Chemical process industry- containers for hot concentrated acids, ammonia, and sulfur dioxide. Food processing industry- used in contact with hot acetic and citric acid.
Ok let's start with AISI 309H Chemical Composition.
Mn, Manganese max.2.00
P, Phosphorus max.0.045
S, Sulfur max.0.030
Si, Silicon max.0.75
Learn more about Chemical Composition.
Now it's the mechanical properties turn:
Yield Strength205 MPa
Learn more about Yield Strength.
Tensile Strength515 MPa
Learn more about Tensile Strength.
Elongation (min.)40 %.
Learn more about Elongation.
Learn more about Hardness.
Density7.8 g/cm3, 7800 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 309H currently ranks 42 in my yield strength index. This means there are other 41 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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