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Need to find out the name of this alloy

  1. Dec 7, 2011 #1
    I have the composition for this alloy that I have to find out which metallic material it is supposed to be:

    Fe:96.23%
    C:0.623%
    Cr:1.098%
    Ni:1.0028%
    Si:0.4219

    My guess it it is among the tool steels family but I cant be sure...
     
  2. jcsd
  3. Dec 7, 2011 #2

    Astronuc

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    Staff: Mentor

    It's a high-carbon (C > 0.6%, but just barely), low alloy nickel-chromium steel. It is similar to some tool steels.

    http://www.keytometals.com/Articles/Art62.htm
    nickel-chromium steels

    Many steels of this level have some Mn or Mo in them.

    I haven't found a carbon steel with 1%Cr, 1%Ni 0.4%Si, although a few are close.

    Similar alloy compositions have either higher Ni or Cr.

    The sum of the C, Cr, Ni, Si = 3.1457%

    The total Fe, C, Cr, Ni, Si = 99.3757%, so is there something missing (e.g., ~0.6243% Mn), or the Cr or Ni is a bit higher?
     
  4. Dec 8, 2011 #3
    It might be that Cr and Ni are a bit higher since I wrote the composition off of some software that we have at Lab. If that is the case then what will the alloy be?
     
  5. Dec 8, 2011 #4

    Astronuc

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    Staff: Mentor

    The alloy seems to be a non-standard alloy. Most of what I can readily find contains Mn and less or no Si.

    Code (Text):
                 C         Mn       Cr         Ni
    SAE 3150 0.48/0.53 0.70/0.90 0.70/0.90 1.10/1.40
    SAE 3250 0.45/0.55 0.30/0.60 0.90/1.25 1.50/2.00
    So it could be a derivative of 3260, but the Ni of one's sample is too low.

    Si is not part of the 3100 or 3200 series, and they have Mn. In one's sample, the Si is at the roughly the same mid-range value of the Mn level for 3260.

    These may be of use:
    http://www.timken.com/en-us/Knowled...s/Timken_Practical_Data_For_Metallurgists.pdf
    http://www.secowarwick.com/htdb/HeatTreatingDataEBook.2011.pdf [Broken]

    One could try to find an electronic copy of Woldman's engineering alloys By Norman Emme Woldman, John P. Frick, and search for C 0.6 and then try to find alloys with about 1% each of Cr and Ni, and 0.4% Si.
     
    Last edited by a moderator: May 5, 2017
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