本报告由焊接研究委员会主持编写，是对347型不锈钢管道焊接信息的全面审查。包括已发布和之前未发布的数据。本文介绍了铌稳定不锈钢的起源和发展，以便熟悉目前生产的347型不锈钢的实际化学成分。提供了有关锻造材料、铸件和焊接金属的微观结构和性能的事实，这有助于解释焊接接头的性能。本报告的主要部分介绍了焊接工艺和接头性能。 彻底覆盖焊接缺陷的原因和处理方法。最后一节回顾了347型焊接管道和在役管道的性能，包括化学工业、炼油厂、蒸汽发电厂和核能服务中的耐腐蚀管道等应用。提供了主题索引。

The present report, prepared under the auspices of the Welding Research Council, is a comprehensive review of information on the welding of Type 347 stainless steel piping and tubing. Both published and previously unpublished data are included. An account is given of the origin and development of columbium stabilized stainless steel to provide familiarity with the actual chemical composition of the Type 347 grade as it is currently produced. Facts are supplied on microstructure and properties of wrought material, castings and weld metal which later help explain the properties of welded joints. The main portion of the report is devoted to welding procedures and joint properties. Welding defects are thoroughly covered as to cause and cure. A final section reviews the performance of Type 347 welded piping and tubing in service, and includes such applications as corrosion resisting piping in the chemical industry, petroleum refineries, steam power plants and nuclear energy service. A subject index is provided.