AISI 309H Properties (Chem., Mech. & Rankings) 2022

 

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.

Application

Heat 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.

UNS Number

S30909

Ok let's start with AISI 309H Chemical Composition.

Chemical Composition

C, Carbon

0.04–0.10

Mn, Manganese max.

2.00

P, Phosphorus max.

0.045

S, Sulfur max.

0.030

Si, Silicon max.

0.75

Cr, Chromium

22.0–24.0

Ni, Nickel

12.0–15.0

Learn more about Chemical Composition.

Now it's the mechanical properties turn:

Yield Strength

205 MPa

Learn more about Yield Strength.

Tensile Strength

515 MPa

Learn more about Tensile Strength.

Elongation (min.)

40 %.

Learn more about Elongation.

Hardness

217 HBW

Learn more about Hardness.

Density

7.8 g/cm3, 7800 kg/m3.

Learn more about Density.

Elastic Modulus

200 GPa.

Learn more about Elastic Modulus.

Poisson's ratio

0.27.

Learn more about Poisson's ratio.

Allowable Stress or Factor of Safety

Depends 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 Classroom

Are you having trouble understanding the basics of AISI?

What is AISI: Classification and specification?

This video will walk you through:

References

ASTM A240 and other references.

Citation

When you need to include a fact or piece of information in an assignment or essay you should also include where and how you found that piece of information.

That gives credibility to your paper and it is sometimes required in higher education.

To make your life (and citation) easier just copy and paste the information below into your assignment or essay:

Luz, Gelson. AISI 309H Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. URL

Now replace dd, mmmm and yyyy with the day, month, and year you browsed this page. Also replace URL for the actual url of this page. This citation format is based on MLA.

Equivalent Specifications

SAE 309H