ACFM can be utilized at temperatures up to which of the following?

ACFM, or Alternating Current Field Measurement, is a non-destructive testing technique primarily used for detecting surface-breaking defects in metallic materials. One of the essential considerations when employing ACFM is the temperature of the material being inspected. The method has a specific operational temperature limit, which is crucial for ensuring accurate readings and preventing damage to the equipment or the material.

The upper limit for ACFM usage is generally acknowledged to be around 900°F. At temperatures exceeding this threshold, the performance of the ACFM system can deteriorate due to changes in the electrical conductivity of the material, potential thermal effects on the sensors, and issues related to safety and reliability in readings. Hence, using ACFM at temperatures up to 900°F allows for effective defect detection while maintaining the integrity and reliability of the testing process. Keeping this temperature limitation in mind is vital for inspectors and engineers to achieve accurate and safe inspections.