In this post I'll talk about SAE 1140. First let's describe it and then have a look at its material's properties.
What is SAE 1140?The SAE 1140 carbon steel is a free cutting steel. It has high strength, and is combined with sulfur in order to increase its machining characteristics.
ApplicationSAE 1140 carbon steel is mainly used in screw stock or high speed and free machining operations.
Ok let's start with SAE 1140 Chemical Composition.
P, Phosphorus max.0.040 max
Learn more about Chemical Composition.
Now it's the mechanical properties turn:
Yield Strength340 - 570 MPa
Learn more about Yield Strength.
Tensile Strength600 - 700 MPa
Learn more about Tensile Strength.
Elongation (min.)14 - 18%.
Learn more about Elongation.
Reduction of Area (min. %)39 - 46%.
Learn more about Reduction of Area.
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 1140 currently ranks 99 in my yield strength index. This means there are other 98 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 A29 and other references.
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Luz, Gelson. SAE 1140 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. URL
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Equivalent SpecificationsASTM A29