Standard WRC Bulletin 342 for the determination of ferrite content
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This post was last edited by Black gold on 2011-11-20 16:07. Standard for determining ferrite content: WRC Bulletin 342
WRC 342 Stainless Steel Weld Metal: Prediction Of Ferrite Content. Publication date: 1989; Authors: C. N. McCowan, T. A. Siewert, D. L. Olson. Publication type: Bulletin. Number of pages: 42. Abstract: A new diagram is proposed for predicting the ferrite number (FN) in stainless steel welds. This diagram covers a range of 0 to 100 FN, and it indicates the primary solidification zones. It provides more accurate predictions of the ferrite content in welds with an FN of less than 18 compared to existing diagrams. It corrects the overestimations made by the DeLong diagram for AWS type 309 stainless steel, and it predicts the FN of duplex stainless steels more accurately than the Schaeffler diagram. The weld compositions used to develop this diagram ranged (on a weight percentage basis) from 0.01 to 0.2% C, 0.4 to 12% Mn, 0.1 to 1.3% Si, 15 to 32% Cr, 5 to 25% Ni, 0 to 7% Mo, 0.02 to 0.3% N, 0 to 0.9% Nb, and 0 to 0.1% Ti. The database containing information on over 950 welds is provided in Appendices I and II of this report.