Accession Number : AD0777095

Title :   Properties of 17-4PH Steel.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Judy,R. W. , Jr. ; Fujii,C. T. ; Goode,R. J.

Report Date : 18 DEC 1973

Pagination or Media Count : 24

Abstract : 17-4PH stainless steel was investigated for its fracture and stress corrosion cracking properties under both open circuit and cathodically coupled conditions. Established fracture mechanics test and interpretation procedures were used to determine the suitability of this material for use in the marine environment. The material was found to be sensitive to environmental cracking processes to such a degree that the characteristic K(Iscc) values for the conditions of cathodic coupling were extremely low for materials in the strength range of interest. Evidence of crack growth was found on the fractured surfaces of test specimens of 17-4PH steel. The conclusions of this investigation were that brittle fracture is not a problem for 17-4PH, but environmental crack growth is expected to cause maintenance problems for structures designed for long life. (Modified author abstract)

Descriptors :   *Stainless steel, Fracture(Mechanics), Stress corrosion, Cracking(Fracturing), Test methods, Tearing, Dynamic tests

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE