MIL-STD-1895A, MILITARY STANDARD: RADIOGRAPHIC REFERENCE STANDARDS AND RADIOGRAPHIC PROCEDURES FOR PARTIAL-PENETRATION ALUMINUM WELDS (20 OCT 1986)., This standard provides standard reference radiographs and recommendedradiographic inspection procedures for partial-penetration weldments in aluminum plate, casting,or forging, 0.5 to 2 inches (in.) (12.70 to 50.80 millimeters (mm)) thick.