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ASTM A275/A275M-08(2013)
Standard Practice for Magnetic Particle Examination of Steel Forgings
Automaticky preložený názov:
Štandardné praktiky pre magnetickú Vyšetrenie Oceľové výkovky
NORMA vydaná dňa 1.4.2013
Informácie o norme:
Označenie normy: ASTM A275/A275M-08(2013)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.4.2013
Kód tovaru: NS-1852
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM A275/A275M-08(2013) :
Keywords:
circular magnetization, d c magnetization, dry method, fluorescent method, longitudinal magnetization, steel forgings, surface flaw detection, wet method, ICS Number Code 77.040.20 (Non-destructive testing of metals), 77.140.85 (Iron and steel forgings)
Doplňujúce informácie
| Significance and Use | ||||||||||
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4.1 For ferromagnetic materials, magnetic particle examination is widely specified for the detection of surface and near surface discontinuities such as cracks, laps, seams, and linearly oriented nonmetallic inclusions. Such examinations are included as mandatory requirements in some forging standards such as Specification A508/A508M. 4.2 Use of direct current or rectified alternating (full or half wave) current as the power source for magnetic particle examination allows detection of subsurface discontinuities. |
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| 1. Scope | ||||||||||
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1.1 This practice2 covers a procedure for magnetic particle examination of steel forgings. The procedure will produce consistent results upon which acceptance standards can be based. This practice does not contain acceptance standards or recommended quality levels. 1.2 Only direct current or rectified alternating (full or half wave) current shall be used as the electric power source for any of the magnetizing methods. Alternating current is not permitted because its capability to detect subsurface discontinuities is very limited and therefore unsuitable. 1.2.1 Portable battery powered electromagnetic yokes are outside the scope of this practice. 1.3 The minimum requirements for
magnetic particle examination shall conform to practice standards
of Practice E1444/E1444M. If the requirements of this practice are
in conflict with the requirements of Practice E1444/E1444M, the
requirements of this practice shall prevail.
1.4 This practice and the applicable material specifications are expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M” specification designation [SI units], the material shall be furnished to inch-pound units. 1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.6 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. |
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| 2. Referenced Documents | ||||||||||
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