Standard Practice for Magnetic Particle （磁粉的标准实践）.pdfVIP

Designation: E 1444 – 94a An American National Standard Standard Practice for Magnetic Particle Examination1 This standard is issued under the fixed designation E 1444; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval. This specification has been approved for use by agencies of the Department of Defense. 1. Scope SNT-TC-1A Recommended Practice and Supplement Mag- 1.1 This practice establishes minimum requirements for netic Particle Inspection5 magnetic particle examination used for the detection of surface 2.4 Society of Automotive Engineers (SAE)-AMS Docu- 6 or slightly subsurface discontinuities in ferromagnetic material. ments: This practice is intended as a direct replacement of MIL-STD- AMS 2300 Premium Aircraft-Quality Steel Cleanliness 1949. Guide E 709 can be used in conjunction with this Magnetic Particle Inspection Procedure7 practice as a tutorial. AMS 2301 Aircraft Quality Steel Cleanliness Magnetic Par- 1.2 The magnetic particle examination method is used to ticle Inspection Procedure7 detect cracks, laps, seams, inclusions, and other discontinuities