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  1. dawgs83

    316 Class 2 Bolts

    I'm confused we did not make these parts. These are parts that we received from another vendor that were hot forged, and annealed from strain hardened material and then tensile tested and met the mechanical requirements. I am not sure how they would not meet requirements if they are chemical...
  2. dawgs83

    316 Class 2 Bolts

    I'm sorry I guess I am not following if the bolts were made from 316 Strain hardened material but were hot forged would they not still have the marking of B8MSH if they were 304 strain hardened they would be B8SH correct? I am not seeing in the spec were it clarifies if the bolt can be...
  3. dawgs83

    316 Class 2 Bolts

    Thanks for the explanation. I am familiar with A193 but I did not understand what you meant by head code not matching the requirements. Could the parts not be marked B8SH if it were hot forged from strain hardened round bar?
  4. dawgs83

    316 Class 2 Bolts

    Can you all give me a little more information regarding the part being sensitized and also the head code not matching the requirements inside the standard. Also is the microstructure applicable to the part being acceptable if the mechanicals are measuring correctly? I guess what i'm asking there...
  5. dawgs83

    316 Class 2 Bolts

    It is my understanding that class 2 316 and 304 bolts under the A193 and A320 specs are not to be hot forged because the material is strain hardened. We received some bolts that were hot forged from class 2 material and were full size axially tensile tested. The test show the bolts exceeding the...
  6. dawgs83

    Solution Annealing Hot Forged Fasteners

    Thank you all for the feedback. I guess what seems murky to me is that if we are using the correct material, meeting the required mechanicals, and maintaining the required corrosion resistance I am not sure what solution annealing further would accomplish. In fact it would seem further heat...
  7. dawgs83

    Solution Annealing Hot Forged Fasteners

    Yes i am referring to the austenitics. Mainly 304 and 316. I am interpreting it the same way as you I think. If it does not explicitly say that the anneal needs to be done on a finished part then I assume that we do not need to anneal after forging if the mechanical and corrosion requirements...
  8. dawgs83

    Solution Annealing Hot Forged Fasteners

    There are few common ASTM specifications in our industry including A193 and F593. These spec call for a solution anneal after the hot forging process. We are using round bar that has already been through a solution anneal treatment, heating it to forging temp., forging, and then water quenching...

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