F51 Properties ⚙️ (Chem., Mech. & Rankings) rev. 2022

 

In this post I'll talk about F51. First let's describe it and then have a look at its material's properties.

What is F51?

F51 stainless steel is a duplex stainless steel whose design enables combining improved resistance to pitting, high strength, stress corrosion, crevice corrosion and cracking.

Application

Duplex stainless steel for general use, mainly in the petrochemical industry.

UNS Number

S31803

Ok let's start with F51 Chemical Composition.

Chemical Composition

C, Carbon max.

0.030

Mn, Manganese max.

2.00

P, Phosphorus max.

0.030

S, Sulfur max.

0.020

Si, Silicon max.

1.00

Cr, Chromium

21.0–23.0

Ni, Nickel

4.5–6.5

Mo, Molybdenum

2.5–3.5

Learn more about Chemical Composition.

Now it's the mechanical properties turn:

Yield Strength

450 MPa

Learn more about Yield Strength.

Tensile Strength

620 MPa

Learn more about Tensile Strength.

Elongation (min.)

25 %.

Learn more about Elongation.

Hardness

293 HBW

Learn more about Hardness.

Density

7.82 g/cm3, 7820 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 F51 currently ranks 4 in my yield strength index. This means there are other 3 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.

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. F51 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

ASTM A182 Grade F51 ASTM A182 Grade F60 ASTM A240 Grade S31803 ASTM A240 Grade S32205