ASTM E709-15 pdf free download.Standard Guide for Magnetic Particle Testing.
1 .1 This guide covers 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 he 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 specilications/standards. procedures and techn iq ue S.
1.2 This guide is also a reference that may be used as follows:
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, 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), and
1.4.4 Polymer magnetic particle (see 8.5.8).
1.5 Personnel Qualification—Personnel performing examinations in accordance with this guide should he 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.
1.7 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.ASTM E709 pdf download.