Around 2001, a new steel material was developed that showed improved fatigue initiation life as well as improved crack growth life in welded structures, and a new alternative for fatigue life improvement was introduced. This steel was denoted FCA (Fatigue Crack Arrester) steel. In order to establish a design S-N curve that can be used for the FCA steel it was agreed 3 years ago to initiate a joint industry project between Kawasaki Shipbuilding Corporation, Sumitomo Metal Industries and Det Norske Veritas. This project is now finished and a design S-N curve has been proposed based on 66 small scale test data from small scale testing of specimens made from FCA steel and 18 tests from test specimens made from conventional steel. The results from this joint industry project including a proposed design S-N curve for FCA steel are presented in this paper.
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机译：大约2001年，开发了一种新的钢材，显示出改善的疲劳发起寿命以及改善焊接结构的裂缝生长寿命，并引入了疲劳寿命改善的新替代方案。该钢板表示FCA（疲劳裂缝避雷器）钢。为了建立一个可以用于FCA钢铁的设计S-N曲线，它在3年前达成了一致的商定，在Kawasaki造船公司，住友金属工业和Det Norske Veritas之间启动联合行业项目。该项目现已完成，并且已经基于66个小规模测试数据提出了一种从FCA钢的试样的小规模测试，以及由传统钢制成的试样的18个测试。本文介绍了该联合工业项目的结果，包括建议的FCA钢钢曲线。
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