ASTM E505 Reference Radiographs for Inspection of Aluminum and Magnesium Die Castings

    What is ASTM E505?

    ASTM E505 sets out reference radiographs for inspecting aluminum and magnesium die castings. These reference images show different kinds and severities of discontinuities that can be found in the die-cast parts. The standard compares production radiographs with applicable reference radiographs to determine the type and severity of indications detected. ASTM E505 (Standard Reference Radiographs for Inspection of Aluminum and Magnesium Die Castings) reference radiographs are used in laboratories and factories to maintain a consistent severity of the discontinuities and to be used for quality control, acceptance evaluation, and casting process improvement. The standard helps interpret radiographic images consistently during casting inspection.

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    Get Certified ASTM E505 Testing for Reliable Die-Casting Inspection

    During the die casting process, discontinuities can occur within the aluminum or magnesium casting. Therefore, X-ray examination can be used to detect internal problems that could impact the quality of the casting and how it performs. The appearance and severity of discontinuities can be classified by reference radiographs provided in ASTM E505. These comparisons can be used for quality control, casting acceptance, process monitoring, and evaluation of casting quality.

    What is the Scope of the ASTM E505 Test Standard?

    This standard practice is a reference document for discontinuities found in aluminum and magnesium die castings. The standard employs categorized radiographic images to assist inspectors in comparing indications for gas porosity, shrinkage, inclusions, and cracks.  ASTM E505 addresses reference radiographs for inspecting aluminum and magnesium die castings. The reference radiographs depict discontinuity types and severity levels that inspectors can use to aid them in the assessment of production radiographs. The ASTM E505 standard-

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    • Supplies reference radiographs of aluminum die castings.
    • Supplies reference X-rays of magnesium die castings.
    • Helps to assess internal casting defects.
    • Covers discontinuities such as gas porosity and shrinkage.
    • Assists in the detection of inclusions and cracks.
    • Offers severity levels for comparison.
    • Facilitates the consistent interpretation of radiographs.
    • Assists manufacturers in assessing casting quality.

    What are the Uses of ASTM E505 Testing?

    ASTM E505 reference radiographs are used to ascertain discontinuities found at the time of radiographic inspection by a laboratory or manufacturer. Inspectors compare production radiographs with a set of reference conditions using the images. This standard-

    • Assesses discontinuities in die castings.
    • Aids in the classification of gas porosity.
    • Assesses shrinkage indications.
    • Helps to assess inclusions and cracks.
    • Supplies severity levels as references.
    • Helps to monitor the quality of the cast.
    • Assists in assessing production consistency.
    • Helps with acceptance and process improvement efforts.

    Which materials can be tested under ASTM E505?

    ASTM E505 covers the die casting of aluminum and magnesium. These cast materials can be evaluated for internal discontinuities with the reference radiographs. The casting alloy, section thickness, radiographic technique, and reference category should be known before comparing production radiographs.

    Why is ASTM E505 Important?

    ASTM E505 is a standard that offers a set of reference images to assist researchers in interpreting radiographic indications in aluminum and magnesium die castings. The consistent comparison minimizes differences in the visual assessment of casting discontinuities. The reference radiographs can be used by manufacturers to set acceptable levels of discontinuities and aid in quality control for die casting production.

    ASTM E505 Equipment and Sample Preparation Guide

    ASTM E505 is applicable to the radiographic examination of die-castings of aluminum and magnesium and provides for appropriate radiographic equipment and reference radiographs. The casting and radiographic image are produced in the laboratory based on the applicable inspection requirements.

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    Sample and Specimen DetailsRepresentative aluminum or magnesium die-castings are inspected in laboratories, and radiographic images are generated to be compared with ASTM E505 reference radiographs.
    Specimen PreparationThe casting is cleaned, identified prior to radiographic examination, and placed in the correct position for the radiographic procedure to be used.
    Specimen DimensionsThe radiographic technique and reference to which comparison is to be made depend on the dimensions of the casting and the thickness of the section.
    InstrumentationThe inspection is performed with radiographic equipment, an appropriate radiation source, an image receptor, image processing equipment, and ASTM E505 reference radiographs.

    Testing Procedures and Requirements for ASTM E505

    This standard guides the radiographic inspection of Aluminum and Magnesium die-castings to produce an image. Production radiographs are then compared to the appropriate reference radiographs to determine the type and severity of the discontinuity. The inspection conditions should allow for adequate image quality to identify the appropriate discontinuities and to perform the comparisons. The procedure outlined in the ASTM E505 standard is as follows-

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    Radiographic InspectionTechnicians set up the die casting and conduct radiographic exposure with the desired technique.
    Image EvaluationOperators examine the resulting radiograph for indications within the casting.
    Reference ComparisonDetected indications are compared to the correct ASTM E505 reference radiographs.
    Discontinuity ClassificationTechnicians find the corresponding reference severity level for the applicable discontinuity type.
    Result ReportingLaboratories provide information on the casting identification, radiographic conditions, detected discontinuities, reference category, and applicable severity level.

    ASTM E505 Testing Process and Data Collection

    Analysts identify the aluminum or magnesium die casting and determine the proper radiographic inspection conditions. Analysts place the casting and take the appropriate radiograph. They then evaluate the radiograph for internal discontinuities and compare the indications with the appropriate ASTM E505 reference radiograph. They assess the discontinuity’s nature, position, and magnitude. Lastly, laboratories record the radiographic observations and comparisons. The results can be used to assess casting quality and determine whether the indications are acceptable under the applicable requirements.

    This image shows a radiographic inspection of an aluminum or magnesium die casting using ASTM E505 reference radiographs to evaluate internal discontinuities.
    ASTM E505 Reference Radiographs for Die Casting Inspection

    Common Challenges and Troubleshooting

    Proper radiographic image quality, reference selection, and interpretation are necessary for proper ASTM E505 evaluation. Variations in casting thickness, radiographic technique, and image quality may influence the appearance of indications. Inspectors shall check the casting identification and reference category to be used for inspection before conducting an inspection. Consistent viewing conditions and trained personnel also help improve the reliability of discontinuity classification.

    ASTM E505 Analysis Results and Interpretation

    The report provides a summary of the discontinuities found in the aluminum or magnesium die casting and compares the appearance of the discontinuities with the appropriate reference radiographs. Results are usually directed toward the type of discontinuity, the location of the discontinuity, and the severity of the discontinuity.

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    • The results of the radiographic evaluation in ASTM E505 are reference-based and not a single numerical material property.
    • The indications may be grouped by the reference radiograph and the severity of the indication.
    • When applicable, discontinuity types are reported, such as gas porosity, shrinkage, inclusions, or cracks.
    • The results are accompanied by casting identification and radiographic inspection conditions.
    • Laboratories are able to achieve reliable inspection results by using a consistent radiography technique and by comparing with a reference.

    Link to ASTM E505

    FAQ

    Why is ASTM E505 important?
    ASTM E505 is significant because it offers reference radiographs which are used to aid in the consistent assessment of discontinuities in aluminum and magnesium die castings.
    ASTM E505 defines radiographic indications in Al and Mg die castings and relates the indications to standard radiographic indications.
    ASTM E505 is used to assess the relative severity, location, and type of discontinuities detected in the radiographic image of die castings.

    Updated on September 9, 2026

    Suyog Kamble
    About Author
    Suyog Kamble
    Suyog Kamble is an Operations Associate at Matestlab Inc. Suyog holds a postgraduate degree in organic chemistry and is trained in material science topics.
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