ASTM A 966/A 966M Standard Practice for Magnetic Particle Examination of Steel Forgings Using Alternating Current

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ASTM A 966/A 966M Document Information:

Title
Standard Practice for Magnetic Particle Examination of Steel Forgings Using Alternating Current

ASTM International

Publication Date:
Mar 1, 2008

Scope:

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.

Only alternating 50–60 cycle current shall be used as the electric power source for any of the magnetizing methods.

When subsurface indications are sought in forgings, then dc magnetization in accordance with Practice A 275/ A 275M should be used.

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.

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.

*A Summary of Changes section appears at the end of this standard.

Keywords:

ac magnetization
circular magnetization
dry method
ferritic steel forgings
fluorescent method
longitudinal magnetization
surface flaw detection
wet method

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