Anil M Kulkarni , Milind S. Patil

Abstract:

Steel plates used for ship building application have a combination of metallurgical requirements, which include high strength, excellent weld-ability, high impact strength over a range of temperatures combined with resistance to sea water corrosion. Conventionally, such steel grades have been produced with chemical compositions suitable for quenching and tempering treatments after the plates are hot rolled.

Thermo-mechanical rolling with accelerated cooling of steel with the right chemistry, has eliminated the additional process of heat treatment. Using this philosophy, Essar Steel, has made successful trial production of steel coils and plates suitable for ship building application. This paper describes the process steps used to produce this steel and results obtained for the various tests carried out.