GB/T 7233.1-2023 Translated English of Chinese Standard (GB/T 7233.1-2023, GBT7233.1-2023): Steel castings -- Ultrasonic testing -- Part 1: Steel castings for general purposes
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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.
Appendix A Informative Structural Changes between this Document and ISO 4992
Informative Display Type Generated by Typical Defects
according to GB/T Allowable limits Appendix assessment austenite beam diameter DF bottom wave attenuation bottom wave reduction Clause number couplant defect A defect defect echo defect range Defects with Measurable Delete diameter of flat-bottomed distance gain Document and ISO Dynamic waveform echo Key equivalent diameter Figure gain size method greater than 10mm horizontal hole incident angle international standard Longitudinal wave Martensitic maximum echo height Measurement of semi-wave modifies and adopts moving distance near-field length Non-destructive testing planar defect Probe movement probe position quality grade radiographic range setting reference test block Related display repair welding area replace ISO Scanning position scanning surface Schematic Diagram sensitivity adjustment Shandong sound beam diameter sound path special outer layer stainless steel standard to replace straight probe surface roughness technical differences testing of steel transmission correction Transverse wave Typical display ultrasonic detectability ultrasonic test equipment volumetric defects wall thickness direction waveform of echo