Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

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

Search results for query: *

  • Users: 9two5
  • Order by date
  1. 9two5

    Convert Knoop to Vickers

    Thanks for the help, ASTM E140 was what I was looking for.
  2. 9two5

    Convert Knoop to Vickers

    Does anyone know the formula for converting knoop to vickers. I am using a 500 gram load. I have charts, but they are not complete. Thanks in advance.
  3. 9two5

    Hydrogen Embrittlement

    Just wanted to say thanks to everyone who responded. Our goal was to prove to the mill that our process did not induce the hydrogen into the part. We hardened some parts in nitrogen, never exposing them to endo, and they failed at the site of the inclusions, in the same fasion as the parts we...
  4. 9two5

    Hydrogen Embrittlement

    Sorry for the lack of information. The inclusions are aluminum oxide, and we found them when the part broke during the endurance test.The material spec is 4350 aircraft quality. The material is hot rolled, turned ground and polished. The part diameter is two and one half inches. The gas is...
  5. 9two5

    Hydrogen Embrittlement

    We are having problems with 4350 quenched and tempered parts failing an endurance test. The failures are linked to hydrogen damage at the site of large inclusions, app. one eight of an inch below the surface. The mill that produced the material has claimed that we induced the hydrogen into the...

Part and Inventory Search

Back
Top