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Magnetic Particle Inspection (MPI) Service | JM Hardware®


Magnetic particle inspection, also called MPI , or MT is a non-destructive test (NDT) process for detecting surface and shallow subsurface discontinuities in our heat treatment steel round bar materials. In order to improve our produce quantity, JM Hardware® wind turbine foundation system anchor bolt, roof support system anchor bolt, round bar, high duty stud bolts and many other materials need this test as per clients demands.

Magnetic Particle Inspection (MPI) Service | JM Hardware®

Magnetic particle inspection (MPI) is a non destructive test (NDT) method used to check for surface and near-surface discontinuities in ferrous materials. 

JM Hardware® magnetic particle testing is performed on-site or in one of our state-of-the-art laboratories. 



Because this method relies on a magnetic field to produce results, it works best on ferrous materials, like nickel, iron, cobalt, and some alloys. Components like billets, bars, castings, forgings, fasteners, weldments and extrusions are also commonly tested using magnetic particle inspection.



Magnetic particle inspection methods

Magnetic particle inspection can be performed using a wet or dry method, depending on the application. In both methods, the product is electrically charged to create a magnetic field. Then, ferrous iron particles are applied to the part in a dry or wet suspension. 


If there is a crack or other defect present, the particles will be attracted to the flaw and build up around the leakage to for an “indication.” The indication is then evaluated to determine the characteristics and cause of the defect. Results allow JM Hardware®  Experts to understand the type and severity of any discontinuities on the part’s surface or sub-surface. 




The principle of magnetic particle inspection


A magnetic field passing through an unadulterated piece of steel. Note the parallel flux lines of the magnetic field.

MPI


A damaged or adulterated piece of steel alloy. Notice how the magnetic field is disrupted and no longer parallel.



Ferrous particles are added to the surface of the part and will gather within the inconsistencies of the magnetic field. The particles can be in either dry or wet form and illuminated for easier observation. Any inconsistencies (damage) would mean a failed MPI test and the part would be discarded


JM Hardware® advantage

By examining the nature, location and extent of an indication, our highly trained and experienced inspectors can determine the origin and cause of both surface and near-surface discontinuities. 


JM Hardware® operates full-service non-destructive testing (NDT) and magnetic particle inspection laboratories that utilize advanced equipment capable of performing quality inspections for virtually any form of ferrous material, component or assembly.


For more information about our magnetic particle testing or to request a quote, contact us today. 





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