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Discontinuous yielding in a low alloy steel

  1. Jun 29, 2018 #1
    What could prevent the discontinuous yield (upper and lower) points during a tensile test on a low alloy steel A706 grade?

  2. jcsd
  3. Jun 29, 2018 #2


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    Staff: Mentor

    Are you seeing this in your testing? What is the project? Or is this for schoolwork?
  4. Jul 2, 2018 #3
    Yes, I am seeing this in my testing. It is for a project.

    We mostly run thermomechanically treated bars (Tempcore process) that are A615 grade. They show the typical discontinuous yielding of plain carbon steel. The A706 grade is a low alloy steel predominately strengthened by the addition of manganese and vanadium. I have not found literature on this effect. Could the alloying condition result in a greater degree of continuous yielding rather than discontinuous?

    Also, testing conditions are the same for both types of bars.

    Last edited: Jul 2, 2018
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