With magnetic particle testing, cracks that are open towards the surface or near the surface can be displayed. The workpiece to be tested has to be made of a magnetizable material such as steel (iron), nickel or cobalt. Depending on the requirements and environmental conditions different magnetic powder test methods are available.
On the workpiece to be tested, a magnetic field is generated. The voids create a magnetic effect which is made visible with iron powder.
Standards: DIN EN ISO 9934; DIN EN ISO 17638 (welded joints); DIN EN 10228 (forged pieces); DIN EN 1369 (casting industry)