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See Chinese contents: GB/T 7233.1-2023 GB/T 7233.1-2023: Steel castings -- Ultrasonic testing -- Part 1: Steel castings for general purposes
This Document specifies the general requirements and testing methods for ultrasonic testing of steel castings for general purposes. This Document applies to the ultrasonic testing of general-purposed steel castings having a grain refining heat treatment and a wall thickness not exceeding 600 mm. For steel castings with a wall thickness greater than 600mm, if there is no special requirement, refer to it. This Document does not apply to austenitic steel and austenitic-ferritic duplex stainless steel. Martensitic stainless steel can be implemented as a reference.
