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WRC 318
M00000735
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WRC 318 Part 1: Factors Influencing the Measurement of Ferrite Content in Austenitic Stainless Steel Weld Metal Using Magnetic Instruments; Part 2: Measurements of Ferrite Content in Austenitic Stainless Steel Weld Metal Giving Internationally Reproducible Results
Bulletin / Circular by Welding Research Council, 1986
E. W. Pickering, E. S. Robitz, D. M. Vandergriff; E. Stalmasek
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Part 1: Factors Influencing the Measurement of Ferrite Content in Austenitic Stainless Steel Weld Metal Using Magnetic InstrumentsThis report describes a program conducted under the auspices of the Welding Research Council (WRC) Subcommittee on Welding Stainless Steel to identify the optimum procedure for the preparation of austenitic stainless steel weld samples for Ferrite Number (FN) determination. In order to evaluate candidate sample preparation procedures, a population of samples was prepared by each of the candidate procedures. These samples were then submitted for a round robin FN measurement program. In this program, FN measurements were made using magnetic instrument (Magne-Gage) techniques. The data obtained in this measurement program was compiled and statistically analyzed to yield the mean FN and standard deviation for each candidate procedure sample population. Examination of these statistical data permitted a comparison of the reproducibility of FN measurements for each of the candidate procedures. The mean FN data was also compared. The optimum sample preparation procedure was identified as yielding the best combination of low standard deviation, moderate mean FN, simplicity of application, and low cost. This sample preparation procedure has since been incorporated into AWS A5.4.
Part 2: Measurements of Ferrite Content in Austenitic Stainless Steel Weld Metal Giving Internationally Reproducible Results
This report is a summary of the results of 14 years' work of the IIW Commission 2 in the field of the measurement of the ferrite content done prior to 1978.
The report represents the author's attempt to express as clearly and faithfully as possible the thinking of Commission 2 with respect to ferrite content measurement. However, the opinions expressed in the report are solely those of the author, and cannot be attributed to Commission 2 of the IIW.
The author would like to thank Mr. W. T. DeLong for his assistance in editing the language and technical content of the report and Messrs. U. Girardi, A. Mudde and C. H. Rosendahl for their review and helpful comments.