In this post I'll talk about SAE 4715. First let's describe it and then have a look at its material's properties.
What is SAE 4715?SAE 4715 is a nickel-chromium-molybdenum steel with approximately 0.15% carbon.
ApplicationThere is no known commercial application. They may be used in gears, ring gears, shafts, pinions, spline shaft, piston pins, oil pumps, piston rods and liners, cams, oil tool slips, jigs, gauges, plastic molds, jaws and crankshafts.
Ok let's start with SAE 4715 Chemical Composition.
P, Phosphorus max.0.035
S, Sulfur max.0.040
Cr, Chromium0.45 - 0.65
Learn more about Chemical Composition.
Now it's the mechanical properties turn:
Yield Strength400 MPa
Learn more about Yield Strength.
Tensile Strength560 MPa
Learn more about Tensile Strength.
Learn more about Elongation.
Density7.7 - 8.03 g/cm3.
Learn more about Density.
Elastic Modulus190-210 GPa.
Learn more about Elastic Modulus.
Poisson's ratio0.27 - 0.30.
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 4715 currently ranks 52 in my yield strength index. This means there are other 51 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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