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  1. kpedde01

    ASTM A291 Tempering Temperature

    Hello All: ASTM A291 dictates the minimum tempering temperatures that shall be followed. My questions 1. What is the reason for dictating the minimum tempering temperature ? 2. Can you go any lower on the tempering temperatures (when hardness is not achieved) and what are the risks in doing...
  2. kpedde01

    Concentration of the condensed sulphuric acid

    Hello Everyone, I am working on a flue gas system, the gas stream contains 0.068% - SO2; 40.962% - H2O;7.29 % - O2; 4.47% - CO2 i calculated the dew point temperature using two different equations and came up with 160.30 deg C and 162.90 deg C. My question is if i want to operate below the dew...
  3. kpedde01

    Graphite Flotation

    Hi MOB1, Thanks for the answer but its not for gear, its for wind systems. And in the past we have experienced some failures due to graphite flotation in the components. But I was trying to see if there are any equations to correlate the graphite flotation to mechanical properties.
  4. kpedde01

    Graphite Flotation

    I need some technical help; I have a situation where I need to take decision on a casting with graphite flotation. So I would like to know if you have some information (an equation or something) to correlate mechanical properties and graphite flotation (from micro-structure), so that I can...
  5. kpedde01

    Brazing Suppliers with huge furnaces

    Thanks Unclesyd for the information.
  6. kpedde01

    Brazing Suppliers with huge furnaces

    Hi Everyone, I am looking for brazing vendors to braze Tungsten Carbide. I need vendors who can handle huge parts example something in the dimensions of 2 meters X 2 meters X 1.5 meters. If anyone has such information on the vendors who had such huge brazing furnaces please provide me the...
  7. kpedde01

    Material selection for flue gas cold stack

    thanks for the reply and suggestion corgas
  8. kpedde01

    Material selection for flue gas cold stack

    I am looking for material selection for flue gas cold stack for petroleum coke calcining plant. We use Mg(OH)2 slurry to reduce sulfur. The process conditions are as follows: H2SO4 emissions 20 ppmvd upto 30 ppmvd. O2 - 11.92% chlorides - 350-500ppm coming from HCl from flue gas - Flue gas...
  9. kpedde01

    How to stimulate the cooling rate of the centre of a large componment?

    The problem looks like a thermal problem to me and in my university I have seen thermal students using Gamit or Icepack software for this type of simulations, as said Ansys and Abacus are excellent softwares but you need to choose the boundary conditions and other parameters carefully to mimic...
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