| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.13 ( September 1985 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Properties of YP 36-kgf/mm2 Class Hull Structural Steel Plates Produced by Accelerated Control Cooling Process Yoshihumi Sannomiya, Hiroshi Nishizaki, Jun Nagai, Chiaki Shiga, Hisae Terashima, Toshihiro Sekine |
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Synopsis : Online thermomechanical controlled cooling system named MACS (Multipurpose Accelerated Cooling System) was set into operation in April 1983 at No. 2 Plate Mill at Mizushima Works, Kawasaki Steel Corporation. The mechanical properties of YP 36 kgf/mm2 (350 MPa) class hull structural steel plates of A, D, and E grades manufactured by the MACS process, have been investigated. The plates, manufactured by the MACS process, having 0.05 to 0.09% lower carbon equivalent than usual, are superior to conventional steel plates in the welding crack and toughness at the heat affected zone of a large heat input welded joint. The values of tensile and fatigue tests both in base metal and in the large heat input welded joint, are satisfactory. The application of the MACS device to producing higher strength steel with lower Ceq will introduce the increase in the amount of higher strength hull structural steel plates based on the superior characteristics of their mechanical properties. |
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