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See Chinese contents: GB/T 4162-2022 GB/T 4162-2022: Method for ultrasonic testing of forged and rolled steel bars
This document specifies the general requirements, instruments and equipment, comparative test blocks, testing procedures, testing program, evaluation of testing results, quality grades, testing records, testing reports, for the ultrasonic testing of forged and rolled steel bars (hereinafter referred to as and quot;steel bars and quot;). This document is applicable to the ultrasonic pulse reflection detection of steel bars, which have a diameter of not less than 6 mm. The forged and rolled bars or non-bars, which have other specifications or materials, may make reference to this standard. This document does not apply to the testing of austenitic coarse-grained steel bars.
