第1部分:压力容器钢焊接件韧性分散的冶金研究——第一部分:当前的合作研究日本压力容器研究委员会（JPVRC）的压力容器钢小组委员会（前身为低温钢S/C）过去曾对低温应用钢进行过调查。这些活动导致向PVRC提交了两份报告:“日本铁质材料的低温应用”和“铬板在储罐和压力容器中的应用”这些报告主要涉及钢的韧性，并对钢板制造过程中化学成分和其他各种因素的影响进行了调查和讨论。第2部分:压力容器钢焊接件韧性分散的冶金研究——第2部分:合作研究，1988年2月，大多数钢结构是通过焊接制造的。 因此，在讨论钢结构的整体安全性时，应评估焊接接头和底板中的材料。焊接接头由整个结构中的不连续性组成。它们是化学成分与基板不同的凝固结构（焊接金属），以及通过焊接热循环[热影响区（HAZ）]与基板形成的不同结构，可能是韧性退化的位置。

Part 1: Metallurgical Investigation on Scatter of Toughness in Weldment of Pressure Vessel Steels - Part I: Current Cooperative ResearchThe Subcommittee on Pressure Vessel Steels (formerly S/C on Cryogenic Steels) of the Japan Pressure Vessel Research Council (JPVRC) undertook surveys on the steels for cryogenic application in the past. These activities resulted in two reports which were presented to the PVRC: "Cryogenic Application of Ferrous Materials in JAPAN" and "Application of CR Plate to Storage Tanks and Pressure Vessels." These reports mainly dealt with the toughness of steels, and the effects of chemical compositions and other various factors in the manufacture of steel plate were surveyed and discussed.Part 2: Metallurgical Investigation on Scatter of Toughness in Weldment of Pressure Vessel Steels - Part II: Cooperative Research, February 1988Most of the steel structures are fabricated by welding. Therefore, when discussing the overall safety of steel structures, material shall be evaluated in the welded joint as well as in the base plate. Welded joint consists of the discontinuities in the whole of structure. They are the solidified structure (weld metal) with a different chemical composition from that of the base plate and the dissimilar structure formed by welding thermal cycle [heat-affected zone (HAZ)] to that of the base plate and is presumably the location of toughness degradation.