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Designation: E709 – 08
Standard Guide for
Magnetic Particle Testing1
This standard is issued under the fixed designation E709; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
and orientation of indications that are unacceptable in a specific
part versus those which need not be removed before part
acceptance. Conditions where rework or repair is not permitted
should be specified.
1.4 This guide describes the use of the following magnetic
particle method techniques.
1.4.1 Dry magnetic powder (see 8.4),
1.4.2 Wet magnetic particle (see 8.5),
1.4.3 Magnetic slurry/paint magnetic particle (see 8.5.7),
1.4.4 Polymer magnetic particle (see 8.5.8).
1.5 Personnel Qualification—Personnel performing examinations in accordance with this guide should be qualified and
certified in accordance with ASNT Recommended Practice No.
SNT-TC-1A, ANSI/ASNT Standard CP-189, NAS 410, or as
specified in the contract or purchase order.
1.6 Nondestructive Testing Agency—If a nondestructive
testing agency as described in Practice E543 is used to perform
the examination, the nondestructive testing agency should meet
the requirements of Practice E543.
1.7 The numerical values shown in inch-pound units are to
be regarded as the standard. SI units are provided for information only.
1.8 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1. Scope
1.1 This guide2 describes techniques for both dry and wet
magnetic particle testing, a nondestructive method for detecting cracks and other discontinuities at or near the surface in
ferromagnetic materials. Magnetic particle testing may be
applied to raw material, semifinished material (billets, blooms,
castings, and forgings), finished material and welds, regardless
of heat treatment or lack thereof. It is useful for preventive
maintenance testing.
1.1.1 This guide is intended as a reference to aid in the
preparation of specifications/standards, procedures and techniques.
1.2 This guide is also a reference that may be used as
1.2.1 To establish a means by which magnetic particle
testing, procedures recommended or required by individual
organizations, can be reviewed to evaluate their applicability
and completeness.
1.2.2 To aid in the organization of the facilities and personnel concerned in magnetic particle testing.
1.2.3 To aid in the preparation of procedures dealing with
the examination of materials and parts. This guide describes
magnetic particle testing techniques that are recommended for
a great variety of sizes and shapes of ferromagnetic materials
and widely varying examination requirements. Since there are
many acceptable differences in both procedure and technique,
the explicit requirements should be covered by a written
procedure (see Section 21).
1.3 This guide does not indicate, suggest, or specify acceptance standards for parts/pieces examined by these techniques.
It should be pointed out, however, that after indications have
been produced, they must be interpreted or classified and then
evaluated. For this purpose there should be a separate code,
specification, or a specific agreement to define the type, size,
location, degree of alignment and spacing, area concentration,
2. Referenced Documents
2.1 ASTM Standards:3
A275/A275M Practice for Magnetic Particle Examination
of Steel Forgings
A456/A456M Specification for Magnetic Particle Examination of Large Crankshaft Forgings
D93 Test Methods for Flash Point by Pensky-Martens
Closed Cup Tester
D445 Test Method for Kinematic Viscosity of Transparent
This guide is under the jurisdiction of ASTM Committee E07 on Nondestructive Testing and is the direct responsibility of Subcommittee E07.03 on Liquid
Penetrant and Magnetic Particle Methods.
Current edition approved Feb. 15, 2008. Published April 2008. Originally
approved in 1980. Last previous edition approved in 2001 as E709 - 01. DOI:
For ASME Boiler and Pressure Vessel Code Applications see related Guide
SE-709 in Section II of that Code.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [email protected] For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E709 – 08
and Opaque Liquids (and Calculation of Dynamic Viscosity)
E165 Practice for Liquid Penetrant Examination for General
E543 Specification for Agencies Performing Nondestructive Testing
E1316 Terminology for Nondestructive Examinations
E1444 Practice for Magnetic Particle Testing
E2297 Guide for Use of UV-A and Visible Light Sources
and Meters used in the Liquid Penetrant and Magnetic
Particle Methods
2.2 Society of Automotive Engineers (SAE): Aerospace
Materials Specifications:4
AMS 2300 Premium Aircraft Quality Steel Cleanliness
Magnetic Particle Inspection Procedure