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MIL-STD-1907(4) NOT 6
Inspection, Liquid Penetrant and Magnetic Particle, Soundness Requirements for Materials, Parts, and Weldments
This standard describes the discontinuity limits allowed under four quality level classifications for penetrant inspected and three quality level classifications for magnetic particle inspection. The materials may be forgings, castings, tubes, sheets, bars, etc. Fabrication stages may be machined, unmachined, welded, or unwelded parts/materials.
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Department of Defense [dod]
Department of Defense [dod]