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Recent content by tcwong

  1. tcwong

    General question about hardening and tempering process

    TVP, That's about the information I have come across so far by browsing thru websites, and I think your message has clarified that for me. So, by refering a part half-hard really only mean the strip steel (before forming) has been rolled so that the thinkness has been reduced by a certain...
  2. tcwong

    General question about hardening and tempering process

    To all, I am in the process of evaluating the performance of an existing half hard tempered CRS bracket and I just realized that I don't have any information regarding the physical property of the material after the hardening process other than the hardness number. I know there is a...
  3. tcwong

    General question about hardening and tempering process

    To all, I am in the process of evaluating the performance of an existing half hard tempered CRS bracket and I just realized that I don't have any information regarding the physical property of the material after the hardening process other than the hardness number. I know there is a...
  4. tcwong

    Question on how to calculate assembly torque

    Cory, The websites you have provided have been helpful so far, thanks. I am 100% certain that no study was ever done for this product (otherwise, I wouldn't have the problem I have today)... they never considered it a problem until I came along... I guess I haven't been entirely clear about...
  5. tcwong

    Question on how to calculate assembly torque

    I think I should clarify the problem a bit more... a product has been redesign to go from metal to plastic through a cost reduction effort. The designer who worked on the project didn't consider to add a boss to the mounting flanges of the product. I am new to this company; but from what I...
  6. tcwong

    Question on how to calculate assembly torque

    Indeed, the problem is to identify the preload required to keep the joint together... I have to admit that I don't have a clue on how to do it...
  7. tcwong

    Question on how to calculate assembly torque

    I have an application where I need to calculate the recommended assembly torque between a relatively thin plastic part - 0.1" thick (with clearance hole) to a metal frame with thread thru. hole using #12-24 screws. My biggest concern is the selection of preload. While preload is ususally...

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