What type of material would be used for an ASTM penetrameter when inspecting a one-half inch thick steel plate at the 2-2T quality level?

The use of an ASTM penetrameter, also known as a sensitivity film or test target, is critical for determining the radiographic quality level of imaging. The purpose of the penetrameter is to provide a reference for assessing the image quality produced by the radiography technique and to ensure that the test meets specified sensitivity and quality requirements.

For a one-half inch thick steel plate inspected at the 2-2T quality level, employing a 10 mil thick steel penetrameter is appropriate. This thickness allows the penetrameter to be sufficiently dense to challenge the radiographic system, ensuring that any flaws in the material can be detected. The penetrameter’s thickness is typically derived from the requirements for the specific material and thickness of the part being inspected.

The choice of steel, specifically at 10 mils, matches the density and material characteristics required for effective testing on a steel plate of that thickness, and it conforms with the ASTM standards governing the use and selection of penetrameters for different materials and thicknesses. The other materials listed – plastic, aluminum, and copper – do not meet the density or material-specific requirements needed for effective radiographic inspections of steel, particularly at the specified quality level. Thus,