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Recent content by Gmat

  1. Gmat

    Help with 304SS

    It would be great to have a starting place. I really have no idea how thick the superficial hardness is. Are we talking 0.0001" or 0.001". The less i have to take off the better. We deal with a few plating houses so i will talk to them about their process. If you are willing to give me a hand...
  2. Gmat

    Help with 304SS

    Mike, Thanks for the ideas. However it will be difficult to talk people here into changing the process at this point. It will only be an option if we can not find a suitable solution to the current problem. Ed, Is there anyway to test for the thickness of the superficial hardness in a...
  3. Gmat

    Help with 304SS

    The superficial hardness does not affect anything other then the blasting. I agree it would be much better if we didn't have to anneal the parts but i don't know what media or process would be able to remove the superficial hardness so the softer material will take the required texture. We have...
  4. Gmat

    Help with 304SS

    EdStainless, Thanks for the info on the cryo. I also looked into it and talked with a specialist and they suggested that the cryo would not give the result i was looking for. The corrosion is fairly minimal. I am specifically working with 304L SS here so it is low carbon. The annealing is...
  5. Gmat

    Help with 304SS

    Jsokal thanks for the help. The part is a ring with about a 24" Inner diameter. If you take a cross section it looks like a U but with the opening facing the outer diameter. The outer diameter is 27.5" and the thickness is 0.75" Also the inner diameter thickness is very thin only about 0.047"...
  6. Gmat

    Help with 304SS

    Ok that gives me some help. My sandblaster mentioned to me that we might want to look at cryogenically treating the parts. Does anybody have experience with this. I am told that it should help normalize the part and reduce the surface hardness somewhat without inducing heat that will chance the...
  7. Gmat

    Help with 304SS

    The pieces were made from different pieces of material but from the same supplier. I would have to assume the raw material was from different lots as we bought them about 6 months apart. We have actually somewhat solved this problem now. We bought a new bag of aluminum oxide to blast the parts...
  8. Gmat

    Help with 304SS

    The problem is not apprearing until we try and sandblast the parts. Everything looks perfect until then. The sandblasting is done after the machining. I can not easily test for hardness on these parts as the original part is at our customers currently and they don't want to give it up. I can...
  9. Gmat

    Help with 304SS

    I have run into a problem with manufacturing a part and i am looking for some help to determine what went wrong. First off we manufactured 2 perfect working parts about 6 months ago. We have now tried to duplicate the process and are having problems. The problem is that the 304SS material is...
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