Casting Metal Plate MT and PT Exam Flaw Specimens (Inch Version) Carbon Steel Casting Metal Plate MT and PT Exam Flaw Specimens Casting Metal Plate Magnetic Particle and Liquid Penetrant Exam flawed specimens. Geometry: 0.25" x 4" Plate. Flaws: 3, randomly placed Standard Tolerance: +/-0.150" (4mm). Documentation: NDT Verification Reports, C of C, CAD Drawings and Test Sheets. Material: Carbon Steel. Customized Calibration Test Block and Flaw Specimen also available.