Magnetic particle testing quickly and reliably reveals surface-breaking and slightly sub-surface discontinuities in ferromagnetic materials such as carbon steel, low-alloy steel and cast iron. When the part is magnetised, the leakage flux at the discontinuity attracts the applied iron particles and makes the indication visible.
Applications
- Root and cap passes of fillet and butt welds
- Steel structure nodes, lifting equipment, crane girders
- Pressure vessel nozzle welds, weld preparation checks
- Forgings and castings, shafts, gears
Method
AC/DC yoke magnetisation with colour-contrast or fluorescent particles (under UV-A light). Evaluation is carried out according to the acceptance levels of EN ISO 23278 or the specification. Parts are demagnetised after testing.