Table of fatigue strengths for different steels

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SUMMARY

The discussion centers on the interpretation of fatigue strength values for different steels, specifically S235. The values presented, such as 0±160 and 130±130, represent mean stress and stress amplitude, respectively. Participants confirm that these figures are crucial for understanding fatigue testing and the application of Smith diagrams in material science. A clear understanding of these values is essential for accurate fatigue analysis in engineering applications.

PREREQUISITES
  • Understanding of fatigue strength concepts in materials science
  • Familiarity with S235 steel properties
  • Knowledge of mean stress and stress amplitude in fatigue testing
  • Basic comprehension of Smith diagrams and their applications
NEXT STEPS
  • Research the fatigue testing methods for S235 steel
  • Study the application of Smith diagrams in fatigue analysis
  • Explore the differences between mean stress and stress amplitude in fatigue strength
  • Learn about other steel grades and their fatigue strengths for comparative analysis
USEFUL FOR

Engineers, material scientists, and students studying fatigue analysis and material properties, particularly those working with steel grades like S235.

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I'm looking at a table of fatigue strengths for different steels. I would like to know what the figures mean. For instance, for S235 under streching/pressure it says [tex]0\pm160[/tex] and [tex]130\pm130[/tex]. I believe the values are supposed to be average tension pluss/minus amplitude tension, but I'm not sure. I'm hoping someone can explain this to me, and so maybe I can understand the Smith-diagrams soon as well.
 
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TSN79 said:
I'm looking at a table of fatigue strengths for different steels. I would like to know what the figures mean. For instance, for S235 under streching/pressure it says [tex]0\pm160[/tex] and [tex]130\pm130[/tex]. I believe the values are supposed to be average tension pluss/minus amplitude tension, but I'm not sure.

Pretty much. The values will be mean stress (not tension), followed by the stress amplitude for the particular fatigue test used.
 

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