GB/T 6402-2024: Method for ultrasonic testing of steel forgings

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Scope

This document specifies the general requirements, testing equipment, comparison test block,
testing implementation, classification, assessment, recording levels, acceptance standards and
testing report of ultrasonic testing of steel forgings.
This document is applicable to ultrasonic pulse reflection testing of ferritic, martensitic and
ferritic-martensite steel forgings, austenitic and austenitic-ferritic stainless-steel forgings. It
also applies to the ultrasonic testing of forged high-temperature alloys and alloy steel tortillas.
Steel forgings with other structures may take this as a reference.

Basic Data

Standard ID	GB/T 6402-2024 (GB/T6402-2024)
Description (Translated English)	Method for ultrasonic testing of steel forgings
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H26
Classification of International Standard	77.040.20
Word Count Estimation	26,248
Date of Issue	2024-09-29
Date of Implementation	2025-04-01
Older Standard (superseded by this standard)	GB/T 1786-2008,GB/T 6402-2008
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration