SAE E4340 Properties (Chem., Mech. & Rankings) 2022

 

In this post I'll talk about SAE E4340. First let's describe it and then have a look at its material's properties.

What is SAE E4340?

SAE E4340 is a nickel-chromium-molybdenum steel with approximately 0.40% carbon.

Application

SAE E4340 alloy steel is used in pressure vessels, piston pins, dies, bearings, gears and ordnance.

UNS Number

G43406

Ok let's start with SAE E4340 Chemical Composition.

Chemical Composition

C, Carbon

0.38–0.43

Mn, Manganese

0.65–0.85

P, Phosphorus max.

0.025

S, Sulfur max.

0.025

Si, Silicon

0.15–0.35

Ni, Nickel

1.65–2.00

Cr, Chromium

0.70–0.90

Mo, Molybdenum

0.20–0.30

Learn more about Chemical Composition.

Now it's the mechanical properties turn:

Yield Strength

470 MPa

Learn more about Yield Strength.

Tensile Strength

745 MPa

Learn more about Tensile Strength.

Elongation (min.) 50 mm

0,22.

Learn more about Elongation.

Hardness

Brinell

217

Learn more about Hardness.

Density

7.85 g/cm3.

Learn more about Density.

Elastic Modulus

190-210 GPa.

Learn more about Elastic Modulus.

Poisson's ratio

0.27 - 0.30.

Learn more about Poisson's ratio.

My Material's Ranking Research

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 SAE E4340 currently ranks 29 in my yield strength index. This means there are other 28 materials that are more resistant.

Note: I've analysed 162 materials in order to create an yield strength index. Check my material's comparison post for more details.

SAE Classroom

Are you having trouble understanding the basics of SAE?

What is SAE: Classification and specification?

This video will walk you through:

References

ASTM A519 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. SAE E4340 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

AMS 6415 ASTM A331 ASTM A519 ASTM A752 ASTM A829⁣
MIL S-5000 MIL S-83135 SAE J1397 SAE J404 ASTM A304⁣
ASTM A505 SAE J770 MIL SPEC MIL-S-5000⁣