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Title: Vertical Welding Of 9% Nickel Steel With Higli Yield Strength Consumables Using The Automated Gtaw Process
Author: John A. Beyer, Jr., Larry Colarossi
Source: American Gas Association 1982
Year Published: 1982
Abstract: This project was initiated to improve vertical weld quality on 9% nickel steel LNG tankage and to upgrade the minimum yield strength level of these welds. The automated GTAW process was used because of its reputation for high quality and excellent mechanical properties. Seven consumables were evaluated for weldability by the use of preliminary test plates. Two of the consumables emerged as being suitable for full evaluation and testing. Both of these consumables exhibited excellent weldability, clear radiographs and yield strength levels greater than 60 ksi. Impact properties at -320F were very good with both alloys.




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