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  • Users: yoppu
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  1. yoppu

    Microstructure made from 5Cr21Mn9Ni4N

    Dear all, I seek some advice and opinion regarding this two micro-structures on how and what we can comment on the structure. Opinion and comment are really appreciated. http://files.engineering.com/getfile.aspx?folder=4fd0af88-cc95-4b05-92d9-45026edd8655&file=micro_structure.docx
  2. yoppu

    Exhaust Valve Material?

    Hi, I conducted a spectrometer tests on the failure exhaust valve which the standard material is unknown. i managed to get the result below: C=0.78 ; Si=0.243; Mn=8.850; Cr=18.32; Mo=0.152; Ni=2.3; Cu=0.155; v=0.07; w=0.081. Can somebody help me to find the reference standard for this material?
  3. yoppu

    Exhaust valve for CNG

    i have chemical composition on the valve material as follow: C=10.06 ; Mn=2.12 ; Fe=50.91 ; Ni=5.27 ; Cu=1.37 ; Si=0.37; Cr=20.56. How i can know this result is approximately to which std material?
  4. yoppu

    Valve for CNG

    Hi, did anybody know the common material for CNG exhaust valve.

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