Tag: MAGNETIC PARTICLE

New Revision B released for MIL-HDBK-6870, Nondestructive Inspection Program Requirements for Aircraft and Missile Materials and Parts

MIL-HDBK-6870 Revision B, “Nondestructive Inspection Program Requirements for Aircraft and Missile Materials and Parts,” has just been released and is now available from Document Center Inc.  This 28-page handbook provides the guidance for defining the requirements for establishing a nondestructive inspection (NDI) program for evaluation of structural components in development, production or sustainment of U.S. military aircraft and missiles systems. It is directly applicable when referenced in the item specification contract or order.

MIL-HDBK-6870 is the replacement document for the old MIL-I-6870, which was withdrawn in 1996.  It applies to structures for aircraft and missiles when the design activity or system specification requires nondestructive inspection for production acceptance, and recurring nondestructive inspection for long-term sustainability.

This handbook may also be applicable to mechanical equipment, subsystems and propulsion systems but the guidance should be tailored for such use. This handbook applies to all phases of the system life cycle: acquisition, modification and sustainment.

The NDI Program Plan should be developed at the beginning of the development phase and should define all NDI requirements to be adhered to during system development, test, production, and sustainment.

Like all military handbooks, this document is for guidance only and cannot be cited as a requirement.  Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.  Revision B replaces the previous edition, MIL-HDBK-6870A, which is now obsolete.

All publicly distributed (non-classified) military specifications, standards, and handbooks are available from Document Center Inc.  We have an extensive collection of obsolete documents as well as the current editions.  Use our website, www.document-center.com.  Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  We are available Monday to Friday from 6 am to 5 pm Pacific Time to help you with any questions you may have.

New ASTM E1444 2011 Edition on Standard Practice for Magnetic Particle Testing

ASTM E1444, “Standard Practice for Magnetic Particle Testing,” has been issued as a new 2011 Edition with a redesignation to ASTM E1444/E1444M-11.  This new document number shows that the document has been revamped to include both feet and inches and metric measurements.  It replaces MIL-STD-1949, as well as the previous ASTM E1444-05 Edition from 2005.

This practice establishes minimum requirements for magnetic particle testing used for the detection of surface or slightly subsurface discontinuities in ferromagnetic material. Guide ASTM E709 can be used in conjunction with this practice as a tutorial.

Magnetic particle testing consists of magnetizing the area to be examined, applying suitably prepared magnetic particles while the area is magnetized, and subsequently interpreting and evaluating any resulting particle accumulations. Maximum detectability occurs when the discontinuity is positioned on the surface and perpendicular to the magnetic flux.

The magnetic particle testing method is used to detect cracks, laps, seams, inclusions, and other discontinuities on or near the surface of ferromagnetic materials. Magnetic particle testing may be applied to raw material, billets, finished and semi-finished materials, welds, and in-service parts. Magnetic particle testing is not applicable to non-ferromagnetic metals and alloys such as austenitic stainless steels.

ASTM E1444/E1444M establishes the basic parameters for controlling the application of the magnetic particle testing method. This practice is written so that it can be specified on the engineering drawing, specification, or contract. It is not a detailed how-to procedure to be used by the examination personnel and, therefore, must be supplemented by a detailed written procedure that conforms to the requirements of this practice.

This ASTM Standard and all current (as well as many obsolete) Editions can be purchased from Document Center Inc. at our website, www.document-center.com.  Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  We are able to answer many questions about standards and welcome your inquiries.