Title:
AUSTENITIC HIGH Mn STAINLESS STEEL EXCELLENT IN WORKABILITY
Document Type and Number:
WIPO Patent Application WO/2005/045082
Kind Code:
A1
Abstract:
An austenitic high Mn stainless steel excellent in wokability, characterized in that it has a chemical composition, in mass %, C + N: 0.03 to 0.15 %, Si: 0.1 to 1 %, Mn: 3 to 15 %, Cr: 10 to 16 %, Ni: 1 to 6 %, Cu: 0.3 to 3 %, Mo: : 0.3 to 3 %, and the balance: Fe and inevitable impurities, and the chemical composition is so designed that Md30, which is an indicator for the stability degree of austenite, and SFE, which is an indicator for the formation of stacking fault energy, satisfy the following formulae: -10 < Md30 < 30, and 40 < SFE < 80, Md30 (°C): 497-462(C+N)-9.2Si-8.1Mn-13.7Cr-20(Ni+Cu)-18.5Mo SFE (mJ/m2): 6.2Ni+18.6Cu+0.7Cr+3.2Mn+9.3Mo-53. The above austenitic high Mn stainless steel is improved in workability and retains non-magnetism also after being worked.
Inventors:
HATANO MASAHARU (JP)
ISHIMARU EIICHIRO (JP)
TAKAHASHI AKIHIKO (JP)
ISHIMARU EIICHIRO (JP)
TAKAHASHI AKIHIKO (JP)
Application Number:
PCT/JP2004/016057
Publication Date:
May 19, 2005
Filing Date:
October 22, 2004
Export Citation:
Assignee:
NIPPON STEEL & SUMIKIN SST (JP)
HATANO MASAHARU (JP)
ISHIMARU EIICHIRO (JP)
TAKAHASHI AKIHIKO (JP)
HATANO MASAHARU (JP)
ISHIMARU EIICHIRO (JP)
TAKAHASHI AKIHIKO (JP)
International Classes:
B21B3/02; C22C38/00; C22C38/58; (IPC1-7): C22C38/00; C22C38/58
Foreign References:
| JPH07145452A | 1995-06-06 | |||
| JPS52119414A | 1977-10-06 | |||
| JP2000034546A | 2000-02-02 | |||
| JP2001011579A | 2001-01-16 | |||
| JPH11293405A | 1999-10-26 | |||
| JPH06271995A | 1994-09-27 |
Attorney, Agent or Firm:
Aoki, Atsushi (Ishida & Associates Toranomon 37 Mori
Bldg., 5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)
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