GB/T 26641-2021: Non-destructive testing - Magnetic memory testing - General requirements

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Scope

This document specifies terms and definitions for non-destructive testing (NDT) by the
technique of metal magnetic memory (MMM) as well as general requirements for
application of this technique of the method.
This NDT technique specified in this document has the following objectives:
- determination of the heterogeneity of the magneto-mechanical state of
ferromagnetic objects, detection of defect stress concentration and boundaries of
metal microstructure heterogeneity;
- determination of locations with magnetic stray field aberrations for further
microstructural analysis and/or non-destructive testing and evaluation;
- early diagnostics of fatigue damage of the inspected object and evaluation of its
structural life time;
- quick sorting of new and used inspection objects by their magnetic heterogeneity
for further testing;
- efficiency improvement of non-destructive testing by combining magnetic memory
with other NDT methods or techniques (ultrasonic testing, x-ray, etc.) by fast
detection of the most probable defect locations;
- quality control of welded joints of various types and their embodiment (including
contact and spot welding). See ISO 24497-2 for details of this application.

Basic Data

Standard ID	GB/T 26641-2021 (GB/T26641-2021)
Description (Translated English)	Non-destructive testing - Magnetic memory testing - General requirements
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J04
Word Count Estimation	17,118
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration