For each discontinuity type, ASTM E125 defines . Level 1 : Represents the finest, least severe indications.
Nondestructive testing (NDT) relies heavily on visual comparison to evaluate structural integrity. In magnetic particle testing (MT) of ferrous castings, is the foundational standard used to identify, classify, and grade surface discontinuities. Astm E125 Reference Photographs Pdf
Implementing ASTM E125 in a foundry or machine shop follows a strict workflow: For each discontinuity type, ASTM E125 defines
If you need to implement this standard for your operations, consider exploring the specific requirements of your industry. Tell me: What are you inspecting? In magnetic particle testing (MT) of ferrous castings,
: Maintain a minimum of 100 foot-candles (1076 lux) for visible particles, or use a black light with a minimum intensity of 1000 µW/cm² for fluorescent particles.
Match the size and frequency of the indication to the correct standard photograph grade.
The best source for a clear, legally acceptable version of the standard is the ASTM International website (ASTM E125-63(2018)) .