This specification has been declared NONCURRENT by the Aerospace Materials Division, SAE, as of April 2007. It is recommended, therefore, that this specification not be specified for new designs. NONCURRENT refers to those specifications which have previously been widely used and which may be required for production or processing of existing designs in the future. The Aerospace Materials Division, however, does not recommend these specifications for future use in new designs. This procedure covers ultrasonic inspection of tubular, centrifugally-cast, corrosion-resistant steel cylinders. This procedure has been used typically for locating defects such as cracks, voids, spongy areas, and other discontinuities, but usage is not limited to such applications. This procedure is not applicable to austenitic steels where grain boundaries mask results. Immersion inspection is applicable to tubular products whose wall thickness is 0.5 to 9.0 inches (13 to 229mm). Contact inspection is applicable to tubular product whose wall thickness is 3.0 to 9.0 inches (76 to 229 mm).