Title:
マルテンサイト系ステンレス鋼
Document Type and Number:
Japanese Patent JP4144283
Kind Code:
B2
Abstract:
A martensitic stainless steel comprising C: 0.01-0.10%, Si: 0.05-1.0%, Mn: 0.05-1.5%, P: not more than 0.03%, S: not more than 0.01%, Cr: 9-15%, Ni: 0.1-4.5%, Al: not more than 0.05% and N: not more than 0.1% in mass %, and further comprising at least one of Cu: 0.05-5% and Mo: 0.05-5%, the residual being Fe and impurities, is provided, wherein the contents of Cu and Mo satisfy the following formula (a) or (b), 0.2%≰Mo+Cu/4≰5% (a) 0.55%≰Mo+Cu/4≰5% (b) and wherein the hardness is 30-45 in HRC and the carbide amount in grain boundaries of the prior austenite is not more than 0.5 volume %. The marensitic stainless steel has excellent properties regarding the sulfide stress cracking resistance, the resistance to corrosive wear and the localized corrosion.
Inventors:
Nao Amaya
Kunio Kondo
Masakatsu Ueda
Keiichi Nakamura
Takahiro Kushida
Kunio Kondo
Masakatsu Ueda
Keiichi Nakamura
Takahiro Kushida
Application Number:
JP2002221918A
Publication Date:
September 03, 2008
Filing Date:
July 30, 2002
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C22C38/00; C22C38/04; C22C38/42; C22C38/44; C22C38/54
Domestic Patent References:
| JP9316611A | ||||
| JP62054063A |
Attorney, Agent or Firm:
Michio Mori
Terutada Hogami
Terutada Hogami