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  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

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  1. caseymessick

    AISI 420 vs AISI 420 (modified)

    @EdStainless Thanks for the feedback. Looks like I need to figure out what type I need. Any idea on which standards I will need to purchase that will help control the material chosen? I'm thinking a UNS designation with an ASTM standard. Is there a standard that AISI 420 (modified) is...
  2. caseymessick

    AISI 420 vs AISI 420 (modified)

    Can anyone help me understand the difference between AISI 420 and AISI 420 (modified)? It seems like AISI 420 (modified) has a higher corrosion resistance due to the increase/addition of certain elements. Is there a standard out there that defines AISI 420 (modified)? I can't seem to find an...
  3. caseymessick

    Stress analysis on downhole components (oil and gas)

    @TGS4, Gotcha. ASME is definitely a weakness in my career so far and something I want to improve now that I have just changed jobs and industries. How can I reach you? I tried emailing the email listed on your profile (the @asme.org one) but it bounced.
  4. caseymessick

    Stress analysis on downhole components (oil and gas)

    @TGS4 I appreciate your input, especially pointing me to API 17TR8, that will be a very useful guide. ASME Section VIII however applies to pressure vessels, which is a burst condition rather than the collapse that I am looking at, there could be something useful but the loading conditions are...
  5. caseymessick

    Stress analysis on downhole components (oil and gas)

    @TGS4 My original model and my model moving forward was failure at first yield. For a cylindrical body under external pressure, that's when the inside surface first sees von mises over yield. However, it seems like with that kind of definition for failure, these components are going to be...
  6. caseymessick

    Stress analysis on downhole components (oil and gas)

    @FEA way I see what you're saying now. Thanks for the tip.
  7. caseymessick

    Stress analysis on downhole components (oil and gas)

    Sorry @rb1957, I'm new to these forums, didn't know that multi-posting isn't acceptable. I thought that different people might be able to offer different insights. I am working to build and correct my model and I know that my model isn't good. Which is why I wanted to reach out and see if...
  8. caseymessick

    Stress analysis on downhole components (oil and gas)

    316 SS. Cylindrical tube, closed on both ends, ~3.7" in diameter, about 0.5" wall thickness
  9. caseymessick

    Stress analysis on downhole components (oil and gas)

    Hi all, I'm trying to build a model to accurately as possible simulate the stresses seen in housings in downhole components due to pressure. However, we have known products that are good in downhole environments that I continue to show failing, by a large margin, when simulated in solidworks...
  10. caseymessick

    Check how many tokens or licenses are currently being used

    I have run a lot of jobs, and recently killed a couple and want to start a couple more. I understand how token use occurs, however, I want to simply see how many tokens are currently available (whether the previous tokens have been released and are now available again). Does anyone know how to...
  11. caseymessick

    IR cutoff filter glass

    We're looking for glass that can be used to filter out any infrared radiation. We will be working with CMOS images, and so prefer reflective filtering. We're still in design stages, but need a material that would be work for the glass, so we can start designing the manufacturing process (which...
  12. caseymessick

    Plating

    In designing connectors, I understand that you need to consider plating to simplify film management and to protect the contact spring from corrosion. The question I have is from the following scenario: Copper alloy with nickel underplating and Gold plating on top of the nickel Why would you...
  13. caseymessick

    Connectors

    "I think the "antenna isolator" stipulation clarifies the terminology. Are you using a similar straight male/female connector, or are you connecting a connectorized cable? In the right-angle case, you have something like 4 additional insertion losses before getting into a cable, compared to a...
  14. caseymessick

    Connectors

    We are currently designing a connector for a VGA Right Angle Cable (Antenna Isolator) The problem we are running into is when we test with a right angle connection. When testing straight on, we have no problems, but as soon as the right angle joint is introduced, we get some insertion loss...
  15. caseymessick

    twist and camber

    New at a job designing HDMI connectors. Still learning a bunch, appreciate it if anyone would care to explain a few terms on an engineering drawing I'm looking at: Finish: Ni UNDER PL GOLD PL TIN (MATTE) [Matte is the question I have. Is it referring to it being the top layer of plating?]...

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