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Significance and Use
4.1 These digital reference images are intended for reference only, but are so designed that acceptance standards, which may be developed for particular requirements, can be specified in terms of these digital reference images. The illustrations are digital images prepared from castings that were produced under conditions designed to develop the discontinuities. The images of the 1/4 in. (6.4 mm) castings are intended to be used in the thickness range up to and including 1/2 in. (12.7 mm). The images of the 3/4 in. (19.1 mm) castings are intended to be used in the thickness range of over 1/2 in. (12.7 mm), up to and including 2 in. (50.8 mm).
4.2 Image Deterioration—Many conditions can affect the appearance and functionality of digital reference images. For example, electrical interference, hardware incompatibilities, and corrupted files or drivers may affect their appearance. The ASTM E2002 line pair gauges located in the lower right hand corner of each digital reference can be used as an aid to detect image deterioration by comparing the measured resolution using the gauges to the resolution stated on the digital reference image. Do not use the digital reference images if their appearance has been adversely affected such that the interpretation and use of the images could be influenced.
1.1 These digital reference images illustrate the types and degrees of discontinuities that may be found in magnesium-alloy castings. The castings illustrated are in thicknesses of 1/4 in. (6 mm) and 3/4 in. (19.1 mm).
1.2 All areas of this standard may be open to agreement between the cognizant engineering organization and the supplier, or specific direction from the cognizant engineering organization. These items should be addressed in the purchase order or the contract.
1.3 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.
1.4 These digital reference images are not intended to illustrate the types and degrees of discontinuities found in magnesium-alloy castings when performing film radiography. If performing film radiography of magnesium-alloy castings, refer to Reference Radiographs E155.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings
E1316 Terminology for Nondestructive Examinations
E2002 Practice for Determining Total Image Unsharpness in Radiology
E2446 Practice for Classification of Computed Radiology Systems
E2597 Practice for Manufacturing Characterization of Digital Detector Arrays
SMPTE PracticeRP133SMPTE Recommended Practice Specifications for Medical Diagnostic Imaging Test Pattern for Television Monitors and Hard-Copy Recording Cameras
ICS Number Code 77.150.20 (Magnesium products)
UNSPSC Code 31101607(Magnesium sand casting)
ASTM E2869-13, Standard Digital Reference Images for Magnesium Castings, ASTM International, West Conshohocken, PA, 2013, www.astm.orgBack to Top