In this post I'll talk about S21800. First let's describe it and then have a look at its material's properties.
What is S21800?S21800 is silicon - manganese alloyed austenitic stainless steel. The increased silicon and manganese level inhibit wear, galling and fretting.
ApplicationValve stems, seats and trim, fastening systems, screening, pins, bushings and roller bearings, pump shafts and rings. Other uses include wear plates, rails guides, and bridge pins.
Ok let's start with S21800 Chemical Composition.
C, Carbon max.0.10
P, Phosphorus max.0.060
S, Sulfur max.0.030
Learn more about Chemical Composition.
Now it's the mechanical properties turn:
Yield Strength345 MPa
Learn more about Yield Strength.
Tensile Strength655 MPa
Learn more about Tensile Strength.
Elongation (min.)35 %.
Learn more about Elongation.
Learn more about Hardness.
Density7.89 g/cm3, 7890 kg/m3.
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.
AISI Ranking Research (Stainless Steel)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 S21800 currently ranks 12 in my yield strength index. This means there are other 11 materials that are more resistant.
Note: I've analysed 77 materials in order to create an yield strength index. Check my material's comparison post for more details.
ReferencesASTM A240 and other references.
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Luz, Gelson. S21800 Properties (Chem., Mech. & Rankings). Materials Blog. Gelsonluz.com. dd mmmm. yyyy. URL
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