第1部分:影响使用磁性仪器测量奥氏体不锈钢焊缝金属中铁素体含量的因素本报告描述了在焊接研究委员会（WRC）不锈钢焊接小组委员会主持下开展的一项计划，以确定制备铁素体数（FN）奥氏体不锈钢焊缝样品的最佳程序决心为了评估候选样品制备程序，每个候选程序制备了一组样品。然后将这些样本提交给循环FN测量项目。在这个项目中，FN测量是使用磁性仪器（Magne）进行的- （测量）技术。对该测量程序中获得的数据进行汇编和统计分析，以得出每个候选程序样本群体的平均FN和标准偏差。对这些统计数据的检查允许对每个候选程序的FN测量的再现性进行比较。还比较了FN数据的平均值。最佳样品制备程序被确定为产生低标准偏差、中等平均FN、简单应用和低成本的最佳组合。该样品制备程序已纳入AWS A5。4.第2部分: 奥氏体不锈钢焊缝金属中铁素体含量的测量给出了国际上可重复的结果本报告总结了IIW委员会2在1978年之前进行的铁素体含量测量领域14年的工作结果。本报告代表了作者试图尽可能清晰、忠实地表达第二委员会关于铁素体含量测量的想法。然而，报告中表达的观点仅为作者的观点，不能归因于IIW第二委员会。作者要感谢W.T.德隆先生在编辑报告的语言和技术内容方面提供的帮助，以及。 感谢U.吉拉迪、A.穆德和C.H.罗森达尔的评论和有益的评论。

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 ResultsThis 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.