Stress-Strain Diagrams: Comparing Cast Iron & Stainless Steel

In summary, the stress-strain diagram of Cast Iron differs from that of Stainless Steel in terms of elastic behavior, proportional limit, yield strength, tensile strength, and strain to rupture. Cast Iron has a lower elastic modulus and yield strength compared to Stainless Steel, while Stainless Steel has a higher tensile strength and strain to rupture. The NACA website and ASM handbooks are reliable sources for finding stress-strain diagrams of different materials and there are correlations available for deriving true stress-strain curves based on yield strength and tensile strength data.
  • #1
mecheng
12
0
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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  • #3
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.
 
  • #4
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).
 

FAQ: Stress-Strain Diagrams: Comparing Cast Iron & Stainless Steel

1. What is a stress-strain diagram?

A stress-strain diagram is a graphical representation of the relationship between the amount of stress applied to a material and the resulting strain or deformation. It shows how a material responds to increasing levels of stress and can be used to determine its mechanical properties.

2. What is the difference between cast iron and stainless steel in terms of stress-strain behavior?

Cast iron and stainless steel have different microstructures and compositions, which result in different stress-strain behaviors. Cast iron is more brittle and has a lower yield strength, meaning it can withstand less stress before it starts to deform. Stainless steel, on the other hand, is more ductile and has a higher yield strength, making it more resistant to deformation under stress.

3. How do stress-strain diagrams of cast iron and stainless steel compare?

The stress-strain diagrams of cast iron and stainless steel will have different shapes and slopes. Cast iron will have a more steeply sloped curve, indicating its lower yield strength and tendency to fail suddenly under stress. Stainless steel will have a more gradual curve, indicating its higher yield strength and ability to withstand more stress before failure.

4. What factors affect the stress-strain behavior of cast iron and stainless steel?

The stress-strain behavior of cast iron and stainless steel can be influenced by several factors, including their composition, microstructure, and processing methods. For example, the amount of carbon in cast iron can affect its brittleness, while the addition of alloying elements can alter the properties of stainless steel.

5. How are stress-strain diagrams used in engineering and material selection?

Stress-strain diagrams are useful tools in engineering and material selection because they provide valuable information about a material's mechanical properties. Engineers can use these diagrams to determine a material's strength, ductility, and other important characteristics, which can help them select the most suitable material for a particular application.

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