MIL-STD-1895B, DEPARTMENT OF DEFENSE STANDARD PRACTICE: RADIOGRAPHIC REFERENCE STANDARDS AND RADIOGRAPHIC PROCEDURES FOR PARTIAL-PENETRATION ALUMINUM WELDS (26 JUN 1998)., 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.