MIL-STD-1907, MILITARY STANDARD: INSPECTION, LIQUID PENETRANT AND MAGNETIC PARTICLE, SOUNDNESS REQUIREMENTS FOR MATERIALS, PARTS AND WELDMENTS (07 SEP

MIL-STD-1907, MILITARY STANDARD: INSPECTION, LIQUID PENETRANT AND MAGNETIC PARTICLE, SOUNDNESS REQUIREMENTS FOR MATERIALS, PARTS AND WELDMENTS (07 SEP 1989)., 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.