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  1. ballvalveguy

    Corrosion resistance of Inconel 718, Inconel X750 and Incoloy A286 with dilute sulphuric acid at 70C

    I am aware that these three metals are not great with sulphuric acid, but I need to specify a spring material that will work in this application. I picked what I consider to be probably the best choices, but if anyone can give me some insight in to which would be the best material to use, I'd...
  2. ballvalveguy

    MAST (Maximum Allowable Shaft Torque)

    Does anyone know of an official test to determine the MAST of a ball valve? Should the test be done at the maximum temperature rating of the valve?
  3. ballvalveguy

    H13 tool steel

    I am looking for an inexpensive metal that is stable at high temperatures (to 1500F). I was lookinf at Inconel 718, but they seem to be too expensive for my application. Looking at H13 tool steel, the price seems right, but does anyone know how it compares to Inconel 718 at high temperatures?
  4. ballvalveguy

    HVOF vs Spray and fuse coatings

    I am curious to know the difference between a spray and fuse coating and an HVOF (high velocity oxygen fuel) coating, Can you spray any coating (e.g tungsten carbide, chrome carbide) on to any base metal (410 stainless, Inconel)? How is the process done? What are the advantages of one over...
  5. ballvalveguy

    Coatings

    I am curious to know the difference between a spray and fuse coating and an HVOF (high velocity oxygen fuel) coating, Can you spray any coating (e.g tungsten carbide, chrome carbide) on to any base metal (410 stainless, Inconel)? How is the process done? What are the advantages of one over...
  6. ballvalveguy

    R05255, 90% tantalum, 10% tungsten

    Does anyone have experience machining this material?
  7. ballvalveguy

    Belleville washers or wavo springs

    Does anyone know of a manufacturer that can provide a custom made wavo or belleville washer in Inconel X750 or Inconel 718?

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