Magneto-inductive testing is used to determine material properties of the following grades of material stock or components:
• Ferro-magnetic eddy current
• Austenitic-ferritic (duplex)
• Austenitic-ferritic (super-duplex)
Material characteristics such as percentage ferrite, alloy composition, or heat treatment are determined by magnetizing the material.
A test coil is used which consists of an exciter winding and a receiver winding.
The Foerster Magnatest D comparator instrument is used.
Bar-stock up to 190 mm in diameter can be tested.
For bar-stock up to 80 mm diameter, a magnetic comparator test can be carried out simultaneously with ultrasonic immersion testing on the Tac Tic 76EX test machine.