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Reference Photographs for Magnetic Particle Indications 2 3. N OTE 1—To avoid any misunderstanding, it should be pointed out there is no correlation between degrees of the various defects. Current edition approved Dec. Published December Originally approved in Last previous edition approved in as E — 63 DOI: Order AD JE Preparation 4. They repre- sent the actual size of the indications and the procedure followed was in accordance with Guide E The peak magnetizing current employed was from to A and prod spacing from 4 to 10 in.
A gray magnetic powder is then used. The result is a white indication under normal photographic methods. Basis for Use of Reference Photographs 5. It is admitted that it is impossible to rigidly interpret magnetic particle indications on castings to a set of photographic references; consequently there is a need for close cooperation between the manufacturer and the purchaser.
On many castings, however, only certain areas are sufficiently critical to justify this type of examination. No further reproductions authorized.
ASTM E125 REFERENCE PHOTOGRAPHS PDF