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Type: Posts; User: dgfoster

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  1. These stories of finding screws and bolts etc in...

    These stories of finding screws and bolts etc in castings boggle the mind. Steel immersed in molten iron melts so fast that this seems impossible. Since I expect disbelief of this assertion, a...
  2. At the risk of derailing this thread I will...

    At the risk of derailing this thread I will mention that Seattle has taken it a step further.

    Click this link, for example. Walking Seattle Neighborhoods: Manhole Cover Art

    I am anxious to...
  3. To stress relieve grey cast iron you need to heat...

    To stress relieve grey cast iron you need to heat it to 1150F. Here is a graph of various metals including cast iron vs temp:

    Temperature and Strength of Metals

    311178

    You can see that at...
  4. Please do not braze it. You will very likely...

    Please do not braze it. You will very likely create an area of white or at least very hard iron. Fill it in with Bondo or JB weld.

    Denis
  5. You are very fortunate to have a chance to be a...

    You are very fortunate to have a chance to be a student at RIT!

    A riser above the center would very likely have solved the problem If I were making the riser, I would try one about 2" in diameter...
  6. I have a few of those weights that I use as...

    I have a few of those weights that I use as ...... weights. ;-)

    Like manhole covers they are manufactured to the lowest casting standard possible. No criticism for that as their function is so...
  7. Well, you are indeed entitled to recieve an award...

    Well, you are indeed entitled to recieve an award for resourcefulness and ambition.

    1)You answered one question I was actually thinking about today---are manhole covers grey cast iron or ductile? ...
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