Historical
DIN EN ISO 9934-1:2002
Non-destructive testing - Magnetic particle testing - Part 1: General principles (ISO 9934-1:2001); German version EN ISO 9934-1:2001 (Foreign Standard)
This EN specifies general principles for the magnetic particle inspection of ferromagnetic materials. Magnetic particle inspection is primarily applicable to the detection of surface-breaking discontinuities, particularly cracks. It can also detect discontinuities just below the surface but its sensitivity diminishes rapidly with depth.
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Deutsches Institut für Normung [din]