Martensitic stainless steel composition, method for making amechanical part from said steel and resulting part

Martensitic stainless steel composition, method for making amechanical part from said steel and resulting part

  • CN 101,248,205 B
  • Filed: 06/26/2006
  • Issued: 05/07/2014
  • Est. Priority Date: 06/28/2005
  • Status: Active Grant
First Claim
Patent Images

1. Martensite Stainless Steel, is characterized in that its composition is by weight percentage:

  • -9%



    Cr≤

    13%

    -1.5%



    Mo≤

    3%

    -8%



    Ni≤

    14%

    -1%



    Al≤

    2%

    -0.5%≤

    Ti≤

    1.5%, and Al+Ti >

    =2.25%-trace≤

    Co≤

    2%-trace≤

    W≤

    1%, and Mo+ (W/2)≤

    3%-trace≤

    P≤

    0.02%-trace≤

    S≤

    0.0050%-trace≤

    N≤

    0.0060%-trace≤

    C≤

    0.025%-trace≤

    Cu≤

    0.5%-trace≤

    Mn≤

    3%-trace≤

    Si≤

    0.25%-trace≤

    O≤

    0.0050%And make;

    ·

    Ms(℃

    )=

    1302-42Cr-63Ni-30Mo+20Al-15W-33Mn-28Si-30Cu-13Co+10Ti≥

    50·

    Cr?eq/Ni?eq≤

    1.05Cr eq (%)=Cr+2Si+Mo+1.5Ti+5.5Al+0.6W Ni eq (%)=2Ni+0.5Mn+30C+25N+Co+0.3Cu wherein.

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