In this post I'll talk about SAE 8740. First let's describe it and then have a look at its material's properties.
What is SAE 8740?SAE 8740 is a nickel-chromium-molybdenum steel that contains 0.40% carbon, approximately.
ApplicationThey are used in seamless mechanical tubing.
Ok let's start with SAE 8740 Chemical Composition.
P, Phosphorus max.0.040
S, Sulfur max.0.040
Learn more about Chemical Composition.
Now it's the mechanical properties turn:
Yield Strength380 - 570 MPa
Learn more about Yield Strength.
Tensile Strength580 - 670 MPa
Learn more about Tensile Strength.
Elongation (min.)11 - 23%.
Learn more about Elongation.
Brinell170 - 200
Learn more about Hardness.
Learn more about Density.
Elastic Modulus190 GPa.
Learn more about Elastic Modulus.
Learn more about Poisson's ratio.
Allowable Stress or Factor of SafetyDepends on the project (And its factor of safety).
Learn more about Allowable Stress or Factor of Safety.
My Material's Ranking ResearchWhile 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 8740 currently ranks 64 in my yield strength index. This means there are other 63 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 ClassroomAre you having trouble understanding the basics of SAE?
What is SAE: Classification and specification?
This video will walk you through:
ReferencesASTM A519 and other references.
CitationWhen 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 8740 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.
DIN 1.6546 UNI 40 NiCrMo 2 KB B.S. Type 7 AMS 6322 AMS 6322F AMS 6323
AMS 6323D AMS 6325 AMS 6325D AMS 6327D AMS 6358 AMS 6358B
ASTM A322 ASTM A331 ASTM A505 ASTM A519 SAE J770 SAE J412
AMS 6327 MIL SPEC MIL-S-6049 AMS 7496 ASTM A29 ASTM A752 MIL S-6049
SAE J1397 ASTM A320 (L7C, L73) SAE J404