AISI 255 Properties (Chem., Mech. & Rankings)


 

In this post I'll talk about AISI 255. First let's describe it and then have a look at its material's properties.

What is AISI 255?

AISI 255 Superduplex stainless steel has good mechanical resistance and corrosion resistance (Including pitting corrosion and chloride-containing environments) as well as high tenacity at low temperature.

Application

Oil and gas industries.

UNS Number

S32550

Ok let's start with AISI 255 Chemical Composition.

Chemical Composition

C, Carbon max.

0.04

Mn, Manganese max.

1.50

P, Phosphorus max.

0.040

S, Sulfur max.

0.030

Si, Silicon max.

1.00

Cr, Chromium

24.0–27.0

Ni, Nickel

4.5–6.5

Mo, Molybdenum

2.9–3.9

Learn more about Chemical Composition.

Now it's the mechanical properties turn:

Yield Strength

550 MPa

Learn more about Yield Strength.

Tensile Strength

760 MPa

Learn more about Tensile Strength.

Elongation (min.)

15 %.

Learn more about Elongation.

Hardness

302 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 255 currently ranks 1 in my yield strength index. This means there are other 0 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 255 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

DIN 1.4507 DIN X2CrNiMoCuN25-6-3

COMMENTS

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.
Name

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