ASTM A790 Properties (Chem., Mech. & Rankings)

In this post I'll talk about and give details about ASTM A790. First let's describe it and then have a look at its material's properties.

What is ASTM A790?

ASTM A790 is a Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe.

Category

Corrosion-Resisting and Heat-Resisting Steels

Scope

This specification covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

Ok let's start with ASTM A790 chemical composition.

Chemical Composition

Grade UNS S32750

C max.

0.030

Mn max.

1.20

P max.

0.035

S max.

0.020

Si max.

0.80

Ni

6.0 - 8.0

Cr

24.0 - 26.0

Mo

3.0 - 5.0

N

0.24 - 0.32

Cu max.

0.5

Learn more about chemical composition.

Now it's the mechanical properties turn:

Yield Strength

Grade UNS S32750

80 ksi (550 MPa) min.

Learn more about what is yield strength.

Tensile Strength

Grade UNS S32750

116 ksi (800 MPa) min.

Learn more about what is tensile strength.

Elongation (min.) 50 mm

0.15.

Learn more about what is elongation.

Reduction of Area (min. %)

Not Required.

Learn more about reduction of area.

Hardness Requirements

Grade UNS S32750

300 HBW or 32 HRC max.

Learn more about what is hardness.

Density

7480 - 8000 kg/m3 (around 7.9 g/cm3 or 0.285 lb/in3).

Learn more about density.

Elastic Modulus

180 GPa (26107 ksi) - 210GPa (30458 ksi).

Learn more about the Elastic Modulus.

Poisson's Ratio

Usually around 0.26 – 0.31.

Learn more about the poisson ratio.

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 A790 currently ranks 25 in my yield strength index. This means there are other 24 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:

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 & paste the information below into your assignment or essay:

Luz, Gelson. ASTM A790 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 (The < and > stay, ok?). This citation format is based on MLA.

Other References

A370 Test Methods and Definitions for Mechanical Testing⁣
of Steel Products⁣
A923 Test Methods for Detecting Detrimental Intermetallic⁣
Phase in Duplex Austenitic/Ferritic Stainless Steels⁣
A941 Terminology Relating to Steel, Stainless Steel, Related⁣
Alloys, and Ferroalloys⁣
A999/A999M Specification for General Requirements for⁣
Alloy and Stainless Steel Pipe⁣
E213 Practice for Ultrasonic Testing of Metal Pipe and⁣
Tubing⁣
E309 Practice for Eddy-Current Examination of Steel Tubular⁣
Products Using Magnetic Saturation⁣
E381 Method of Macroetch Testing Steel Bars, Billets,⁣
Blooms, and Forgings⁣
E426 Practice for Electromagnetic (Eddy-Current) Examination⁣
of Seamless and Welded Tubular Products, Austenitic⁣
Stainless Steel and Similar Alloys⁣
E527 Practice for Numbering Metals and Alloys in the⁣
Unified Numbering System (UNS)⁣

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

ASTM,171,Atomic-Mass,327,Atomic-Number,436,Atomic-Radius,86,Atomic-Symbol,329,Atomic-Volume,94,Boiling-Point,94,Chemical-Elements,100,Chemical-Symbol,217,Coefficient-of-Thermal-Expansion,85,Covalent-Radius,87,Crystal-Structure,109,Density,309,Elastic-Modulus,30,Electrical-Conductivity,79,Electro-Affinity,87,Electron-Configuration,109,Electronegativity,102,Electrons-per-Shell,112,Enthalpy-of-Fusion,93,Enthalpy-of-Vaporization,95,Group-Number,218,Heat-of-Fusion,87,Heat-of-Vaporization,85,Ionic-Radius,78,Ionization-Energy,102,Ionization-Potential,101,Melting-Point,96,Oxidation-States,104,Period-Number,107,Properties,38,Specific-Gravity,83,Specific-Heat,92,Specific-Weight,1,Tests,2,Thermal-Conductivity,105,Valence-Electrons,98,
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Materials: ASTM A790 Properties (Chem., Mech. & Rankings)
ASTM A790 Properties (Chem., Mech. & Rankings)
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