Determination of the content of delta ferrite in austenitic stainless steel Nitronic 60

Microstructure of austenitic stainless steel Nitronic 60 is primarily monophasic ie. austenitic. However, the chemical composition can affect on precipitation of delta ferrite. The presence of delta ferrite decrease grain growth and increases strength properties of steel. It is known that, the delta ferrite has a very important role in welding of austenitic steels to prevent the occurrence of hot cracks. This paper presents the results of determining the content the delta ferrite in steel Nitronic 60 using the Schaeffler`s diagram, metallographic methods and method of magnetic induction. Analysis of results showed no significant differences in the content of delta ferrite in relation to deifferent methods of determining the delta ferrite.