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1.1 This practice covers a procedure for the magnetic particle examination of steel forgings using alternating current as the power source. The procedure will produce consistent results upon which acceptance standards can be based. This practice does not contain acceptance limits or recommended quality levels.
1.2 Only alternating 50–60 cycle current shall be used as the electric power source for any of the magnetizing methods.
1.3 When subsurface indications are sought in forgings, then dc magnetization in accordance with Practice A 275/A 275M
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. Unless the order specifies the applicable “M” specification designation [SI units], the inch-pound units shall be used.
1.5 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A275/A275M Practice for Magnetic Particle Examination of Steel Forgings
A508/A508M Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels
A963/A963M Specification for Deep Drawing Steel (DDS), Sheet, Carbon, Cold-Rolled
Other DocumentPracticeNo.SNT-TC-1A Supplement B--Magnetic Particle Method Available from American Society for NonDestructive Testing, 1711 Arlingate Lane, P.O. Box 28518, Columbus, OH 43228-0518.
ICS Number Code 77.040.20 (Non-destructive testing of metals)
UNSPSC Code 31132100(Steel forgings)