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  1. MSUKeith

    Used Lab equipment

    Check out Frank Bacon Machinary at: http://www.frankbacon.com They specialize in met lab equipment resale/refurbish
  2. MSUKeith

    Titanium Content in INCONEL 600

    I agree with Mr. McGuire on this one - something doesn't sound right. At the very least you should: - Get the orginal mill cert from the producing mill, not a retyped cert from a intermediate processor or service center. This will confirm that the mill produced it and shipped it as Inconel 600...
  3. MSUKeith

    Metal Tube Radial Dent/Crush equation?

    Blur, I consider toughness and impact loading a fracture phenomenon - to simplify: way over on the right of the stress strain curve. Where 'denting' and 'bending' are yield phenomenon defined by the transition from elastic to plastic deformation - the left side of the stress strain curve...
  4. MSUKeith

    Metal Tube Radial Dent/Crush equation?

    There is probably not a simple formula for this solution. It will be greatly dependent on not just the material property variables - modulus, yield strength, thickness - but also the shape of the impacting piece. Example: a sharp, pointed piece will concentrate stress, a large ball shaped...
  5. MSUKeith

    Material Substitutions

    Another suggestion: work backwords from the requirements and environment then consider which aspects of the currently specified material are absolute must haves and which can be comprimised some. Sometimes you'll find the list of true requirements is relatively short. Also - don't forget the...
  6. MSUKeith

    Plier material

    Cory- Won't 1020 have a 'hard' time getting to 39 C even at the surface without some sort carburization? guimba- Watch out for soft coatings on your jaws, they will wear quick and may cause gripping issues.
  7. MSUKeith

    Glowing aluminized steel manifolds

    We use ASTM E1933 spec to set emissivity on IR equipment. We also have a book of samples for bare stainless and aluminized steels showing the various heat tints and/or alloying rates with the associated emissivity. This gets us in the ball park just based on comparing visual appearance to the...
  8. MSUKeith

    Glowing aluminized steel manifolds

    We have found that when the effects of aluminized coating alloying with the base steel (turning gray or even black) are evaluated with both a contact thermocouple and an IR thermocouple or camera that convection and conduction are the main heat transfer mechanisms, radiation plays a much smaller...
  9. MSUKeith

    Material curves based on Material Certifivates

    Some other tensile test parameters that can help are the R-Value and particularly the n-value which can help describe the curve through the plastic region. Sometimes these are available on mill certs. Another factor to consider is material thickness. Predicting highly localized stress...
  10. MSUKeith

    Looking to buy steel from China

    Good advice from Metengr, If you do decide to proceed here are some tips: - Make sure you clearly communicate the specifications that the material and welds are to be purchased and manufactured under. These should include details on all the basics, chemistry, mechanical properties, weld...
  11. MSUKeith

    ASTM # for EN 10336

    It is unlikely that any one in the world will electrogalvanize high strength hot roll product. Hot dip galvanize might be available. What gauge are they looking for? 950MPa tensile grades are available in US but as a dual phase grade rather than complex phase and the sizes will be limited...
  12. MSUKeith

    Need n & r values for half hard 304SS for FEA.

    The term 'half hard' can mean a wide variety of processing routes and resulting mechanical properties depending on the producer. The formation of martensite during deformation will vary considerably based on the the exact gauge reduction, temperature, chemistry, etc. The resultant n and r...
  13. MSUKeith

    nozzle clogging with ladle shroud

    Check on your tundish flow change after adding the shroud - you may be considerably changing tundish flow and distrubing tundish powder/surface. Lots can be seen through FEA of flow or water modelling. Also, consider adding argon purge in ladle to tundish shroud (preferably just below ladle...
  14. MSUKeith

    ASTM A1008 (CR) vs. ASTM A1011 (HR)

    GMIracing, A rough estimate of the available gauges for a HSLA grade would be CR: 0.65 - 2.0 mm and HR: 1.7 - 10 mm; hence the small overlap. This due to the available power, reduction and cooling rates of the hot mills on HR product and will vary depending on width, mill etc. On the CR side...
  15. MSUKeith

    predicting the forming limit diagram when sheet thickness changes

    Danny, Welcome aboard, some good discussion here - lets do lunch. Keith
  16. MSUKeith

    ASTM A1008 (CR) vs. ASTM A1011 (HR)

    There is only a small range of gauges available where the HR and CR products overlap therefore if you have a specific gauge in mind it may only be available in one form and only from certian mills. Some mills are more capable than others, such as the continious anneal line at ArcelorMittal...
  17. MSUKeith

    predicting the forming limit diagram when sheet thickness changes

    Just do a search by the diagrams other name - the Keeler-Goodwin Diagram. Here is a good site: http://www.me.mtu.edu/~mom/update Dr.Stuart Keeler is still around and occasionally still gives seminars (highly recommended): www.metalforming.com/PMAPdfs/07CircleGridAnalysis.pdf As far as...
  18. MSUKeith

    predicting the forming limit diagram when sheet thickness changes

    FLD shape remains the same but the FLD0 point will shift the curve up and down based on the n-value and gauge by the equation: FLD0=(23.26+356.11*t)*(n/0.2116) Lots of commercial software out there but it's easy enough to make your own spreadsheet and graph. See also...
  19. MSUKeith

    Looking for a Material

    Why not use 439 or 441/18CrCb? These alloys can withstand the temps mentioned and are much cheaper. Link: http://www.aksteel.com/markets_products/stainless.asp
  20. MSUKeith

    Testing Lab Needed for Carburized Parts

    Use the lab accredidation services and search by the standard or keyword and your location for commercial labs: http://www.a2la.org/

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