Title:
HIGH STRENGTH DUPLEX STAINLESS STEEL EXCELLENT IN CORROSION RESISTANCE
Document Type and Number:
Japanese Patent JP2500162
Kind Code:
B2
Abstract:
PURPOSE: To provide a duplex stainless steel extremely excellent in corrosion resistance and having high strength.
CONSTITUTION: The stainless steel has a composition which consists of, by weight, ≤0.03% C, ≤1.0% Si, ≤1.5% Mn, ≤0.040% P, ≤0.008% S, ≤0.040% sol.Al, 5.0-9.0% Ni, 23.0-27.0% Cr, 2.0-4.0% Mo, >1.5-5.0% W, 0.24-0.32% N, and the balance Fe with inevitable impurities and where PREW represented by the equation (a) is regulated to ≥40: PREW=Cr+3.3(Mo+0.5W)+16N...(a). Besides the components, one or more kinds among Cu, V, Ca, Mg, B, and rare earth elements can be incorporated.
Inventors:
OKAMOTO HIROSHI
Application Number:
JP29401691A
Publication Date:
May 29, 1996
Filing Date:
November 11, 1991
Export Citation:
Assignee:
SUMITOMO METAL IND
International Classes:
C22C38/00; C22C38/44; (IPC1-7): C22C38/00; C22C38/44
Domestic Patent References:
| JP2258956A | ||||
| JP6256556A | ||||
| JP3229839A | ||||
| JP5331517A | ||||
| JP63213619A | ||||
| JP62124218A |
Attorney, Agent or Firm:
Terutaka Hogami