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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.1 (1969) No.1

UD 鋼の開発経過とその特性

Development of UD Steel and Its Characteristics

清水 政治(Masaharu Shimizu) 佐々木 健二(Kenji Sasaki) 神崎 文暁(Humiaki Kanzaki) 持舘 肇(Hajime Mottate)

要旨 :

当社では圧延のままで切欠靱性と溶接性に優れた50kg/mm2 高張力鋼板の製造に成功した。

これは UD 鋼(Uniformity & Ductility Steel)と名づけられたが,その性能は船体用 50kg/mm2 高張力D級鋼に匹敵するものとして,各船級協会の製造承認を得ることができ, すでに「出光丸」をはじめ大型船舶に大量に使用されている。UD 鋼は切欠靱性,溶接性が 優れているのみならず,熱処理を省略した圧延のままの鋼板であるので大量生産向きであ り,かつ経済的な船体用鋼板である。本文はUD 鋼の開発の経過と,諸特性に関する各種確 性試験の結果を報告したものである。 Synopsis :

50kg/mm2 high-tensile strength steel plates having good notch toughness and weldability are being manufactured as rolled on the plate mill at Chiba and Mizushima Works of Kawasaki Steel Corporation. Named after Uniformity and Ductility, UD Steel was approved by Classification Societies of Shipping as 50kg/mm2 high-tensile strength hull steel plate Grade D, and has been used for many large ships such as the Idemitsu Maru (209,300 DWT). As hull steel plate, UD Steel has superior notch toughness and weldability and because of the omission of heat treatment, it is suited for mass production with excellent economic advantage. This report describes the process of the development of UD Steel and its characteristics as obtained from various tests.

(c)JFE Steel Corporation, 2003

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