MIL-STD-1895 Radiographic Reference Standards And Radiographic Procedures For Partial-Penetration Aluminum WeldsThis standard provides standard refernce radiographs and recommended radiographic 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.