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Metal Magnetic Memory Method
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Metal Magnetic Memory Method
News
January 11, 2021
Online Conference "Diagnostics of Equipment and Structures Using the Metal Magnetic Memory". February 25-26, 2021
March 31, 2020
The second edition of ISO 24497-2:2020(E) Non-destructive testing – Metal magnetic memory – Part 2: Inspection of welded joints was published
March 31, 2020
The second edition of ISO 24497-1:2020(E) Non-destructive testing – Metal magnetic memory – Part 1: Vocabulary and general requirements was published

Standards on the metal magnetic memory method

ISO 24497-1:2020(E)

Non-destructive testing – Metal magnetic memory – Part 1: Vocabulary and general requirements

Publication date March, 2020

This second edition cancels and replaces the first edition (ISO 24497-1:2007) and ISO 24497-2:2007, which have been technically revised and merged.

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 magnetic testing method.

The terms specified in this document are mandatory for application in all types of documentation and literature of non-destructive testing, using the metal magnetic memory technique.

This NDT technique has the following objectives:

  • determination of the heterogeneity of the magneto-mechanical state of ferromagnetic objects, detection of defect 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 metal magnetic memory testing 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.

ISO 24497-2:2020(E)

Non-destructive testing - Metal magnetic memory - Part 2: Inspection of welded joints

Publication date March, 2020

This second edition cancels and replaces ISO 24497-3:2007, which has been technically revised.

Scope

This document specifies general requirements for the application of the non-destructive (NDT) metal magnetic memory (MMM) testing technique of the magnetic testing method for quality assurance of welded joints.

This document can be applied to welded joints in any type of ferromagnetic products: pipelines, vessels, equipment, and metal constructions, as agreed with the purchaser.

For the purposes of this document, the terms and definitions given in ISO 24497-1 apply.

GOST R ISO 24497-1-2009 (instead of GOST R 52081-2003)

State Standard of Russian Federation. Non-destructive Testing. Method of Metal Magnetic Memory. Part 1. Terms and Definitions

Introduction date December 01, 2010

Scope

This standard specifies terms and definitions for procedures in the sphere of non-destructive testing by the method of metal magnetic memory.

The terms specified in this standard are mandatory for application in all types of documentation and literature in the sphere of non-destructive testing, using the method of metal magnetic memory included in the scope of standardization works and/or using the results of these works.

GOST R ISO 24497-2-2009 (instead of GOST R 52005-2003)

State Standard of Russian Federation. Non-destructive Testing. Method of Metal Magnetic Memory. Part 2. General Requirements

Introduction date December 01, 2010

Scope

This standard specifies the general requirements for the application of the method of metal magnetic memory of components, units, equipment and structures for various application purposes.

The purposes of the method are the following:

  • Determination of heterogeneity of the stress/strain state of equipment and structures and revealing of stress concentration zones as the main sources of damage.
  • Determination of locations to perform metal sampling in stress concentration zones for assessment of the microstructural-mechanical state.
  • Early diagnostics of fatigue damage and evaluation of equipment and structures life.
  • Reduction of testing and material costs with its utilization in combination with conventional methods of non-destructive testing.
  • Quality control of welded joints of various types and embodiment (including contact and spot welding).
  • Very quick sorting of new and used machine-building products by their microstructural heterogeneity.

GOST R ISO 24497-3-2009

State Standard of Russian Federation. Non-destructive Testing. Method of Metal Magnetic Memory. Part 3. Inspection of welded joints

Introduction date December 01, 2010

Scope

This standard specifies the general requirements for the application of the metal magnetic memory inspection method (ММM inspection) as a non-destructive testing method for quality assurance of welded joints of pressurized components.

This standard may be applied to welded joints in any type of products, pipelines, vessels, equipment and metal constructions, as agreed with the purchaser.

The terms and definitions for the process are contained in GOST R ISO 24497-1-2009, and the general requirements of the process are in GOST R ISO 24497-2-2009.

GOST R 52330-2005

State Standard of Russian Federation. Non-destructive Testing. Evaluation of Deformations in Industrial and Vehicle Structures. General Requirements

Introduction date September 01, 2005

Scope

This standard specifies general requirements to application of methods and means of non-destructive testing of stress-strained state on industrial objects and transport.

This standard applies to products and equipment made of steel and alloys, cast iron and other structural materials without limitations on size and thickness including welded joints.

GOST R 53006-2008

State Standard of Russian Federation. Estimation of Potential Dangerous Objects Lifetime on the Basis of Express Methods. General Requirements

Introduction date September 01, 2009

Scope

This standard covers the objects (various-purpose pipelines, vessels and structures and their elements, including the welded joints of any structural configuration) with exhausted specified (by the manufacturer) design lifetimes, which require the assessment of lifetime characteristics before the expiry of the specified service life, as well as the objects after emergencies and renewals.

This standard specifies the basic requirements to the contents of techniques and standards regulating the procedures of the residual lifetime assessment of the potentially dangerous technical objects with application of non-destructive quick methods of the engineering diagnostics.

Energodiagnostika Co. Ltd is the main developer of a principally new non-destructive testing method and inspection instruments based on the metal magnetic memory (MMM)
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