ASTM A409 Properties (Chem., Mech. & Rankings)

In this post I'll talk about and give details about ASTM A409. First let's describe it and then have a look at its material's properties.

What is ASTM A409?

ASTM A409 is a Specification for Welded Large Diameter Austenitic Steel Pipe for Corrosive or High- Temperature Service.


Corrosion-Resisting and Heat-Resisting Steels


This specification covers straight seam or spiral seam electric-fusion-welded, light-wall, austenitic chromium- nickel alloy steel pipe for corrosive or high-temperature service.

Ok let's start with ASTM A409 chemical composition.

Chemical Composition

Grade 304

C max.


Mn max.


P max.


S max.


Si max.



8.00 - 11.0


18.0 - 20.0

Learn more about chemical composition.

Now it's the mechanical properties turn:

Yield Strength

Grade 304

30 ksi (205 MPa) min.

Learn more about what is yield strength.

Tensile Strength

Grade 304

75 ksi (515 MPa) min

Learn more about what is tensile strength.

Allowable Stress

Depends on the project (And its factor of safety).

Learn more about the what is allowable stress.

My Material's Rank

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 ASTM A409 currently ranks 121 in my yield strength index. This means there are other 120 materials that are more resistant.

Note: I've analysed 134 materials in order to create an yield strength index. Check my astm material's comparison post for more details.

ASTM Classroom

Are you having trouble understanding the basics of ASTM?

What is the difference between Code, Standard & Specification?

This video will walk you through:



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 & paste the information below into your assignment or essay:

Luz, Gelson. ASTM A409 Properties (Chem., Mech. & Rankings). Materials Blog. 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 (The < and > stay, ok?). This citation format is based on MLA.

Other References

A 240 Specification for Heat-Resisting Chromium and⁣
Chromium-Nickel Stainless Steel Plate, Sheet, and Strip⁣
for Pressure Vessels A 262 Practices for Detecting Susceptibility to Intergranular⁣
Attack in Austenitic Stainless Steels⁣
A 530/A 530M Specification for General Requirements for⁣
Specialized Carbon and Alloy Steel Pipe⁣
E 527 Practice for Numbering Metals and Alloys (UNS)⁣
E 112 Test Methods for Determining Average Grain Size⁣


Who is Gelson Luz anyway?

Gelson Luz is a Mechanical Engineer, expert in welding and passionate about materials. Search for "Gelson Luz" in your favorite browser to learn more.

Materials: ASTM A409 Properties (Chem., Mech. & Rankings)
ASTM A409 Properties (Chem., Mech. & Rankings)
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