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FERRITE CONTENT MEASUREMENT

Austenitic, Duplex, Super-duplex stainless steels require adequate proportion of ferrite in the product to obtain acceptable corrosion resistance and strength and especially resistance to Stress Corrosion Cracking (SCC).

The laboratory based destructive method such as micro structural analysis on the test specimen or sample obtained from the batch of the product or components provides statistical quality assurance. In order to guarantee the acceptable ferrite content in the final product, ferrite measurements are performed on the actual product. Ferrite measurement using Ferritoscope is a non-destructive test method which assures the quality of the product without the need of expensive laboratory based destructive test methods.

For measurement of percentage ferrite content in ferritic welds FerritoScope is used. Calibration is carried out on the basis of calibration block provided by the manufacturer along with certificate. Ferrite content checks are to be carried out before X-ray testing of a joint.

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