Stress-Strain Diagrams: Comparing Cast Iron & Stainless Steel

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Discussion Overview

The discussion centers around the differences in stress-strain diagrams for cast iron and stainless steel, exploring their mechanical properties such as elastic modulus, yield strength, and tensile strength. Participants seek resources and insights into the behavior of these materials under stress.

Discussion Character

  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant inquires about the differences in stress-strain diagrams between cast iron and stainless steel and requests links to relevant resources.
  • Another participant provides links to specific resources, including NACA reports and ASM handbooks, suggesting these as valuable references for stress-strain diagrams.
  • A participant emphasizes the importance of comparing elastic modulus, proportional limit, yield strength, and tensile strength to understand the elastic and plastic behavior of both materials.
  • It is noted that correlations can be used to derive true stress-strain curves from yield strength and tensile strength data, which may serve as validation tools.

Areas of Agreement / Disagreement

Participants generally agree on the importance of specific mechanical properties in comparing the materials, but no consensus is reached on the implications of these differences or the best methods for analysis.

Contextual Notes

The discussion does not resolve the complexities of deriving true stress-strain curves or the specific implications of the differences in material properties.

mecheng
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How the stress-strain diagram of Cast Iron differs from that of Stailless Steel?
If someone can post a link of a website from where I can find stress-strain diagrams of different materials, it would be very helpful for me.

Thanks in advance!
 
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You probably want to look at elastic (Young's) modulus, proportional limit, yield strength (YS), tensile strength(UTS) and compare them. That is what can you say about the elastic behavior of the two materials (i.e. less than proportial limit and YS), and what can you say about the plastic range - between YS and UTS, and then after UTS (strain to rupture).

Excellent links Gokul! I had overlooked the NACA documents and that link was very useful.
 
And in case you have only YS and/or UTS data available there are a bunch of correlations to derive true stress-strain curves on the basis of these two (and work as good validation tools as well).
 

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