High. It is an improvement over the older Schaeffler and DeLong diagrams because it accounts for Nitrogen and Copper.
The is the modern industry standard used in welding metallurgy to predict the Ferrite Number (FN) and solidification mode of stainless steel weld metals . It serves as a more accurate successor to the older Schaeffler and DeLong diagrams by incorporating the effects of Nitrogen (N) and Copper (Cu) , which are critical for modern austenitic and duplex stainless steels. 🛠️ The WRC-1992 Calculation Formulas wrc-1992 diagram calculator