WRC-1992 Diagram Calculator

Predict weld metal ferrite content and solidification mode using the WRC-1992 diagram for stainless steel weld metals

Input Parameters

Results

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Creq (WRC-1992)
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Nieq (WRC-1992)
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Ferrite Number (FN)
FN
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Solidification Mode
Note: WRC-1992 supersedes both Schaeffler and DeLong for predicting FN. It removed Si and Mn (found to be statistically insignificant for FN prediction) and added Cu. FA solidification mode provides the best resistance to hot cracking.

Reference

WRC-1992 Diagram (Kotecki & Siewert): Creq = Cr + Mo + 0.7×Nb Nieq = Ni + 35×C + 20×N + 0.25×Cu Solidification modes: A, AF, FA, F FA mode (Creq/Nieq = 1.48-1.95) is optimal for crack resistance. Valid range: Creq 17-31, Nieq 9-18, FN 0-100.