Together with improvements in welding technology, new kinds of steel plate have been developed to assist in the trend towards automatic fabrication in Japanese shipbuilding. Non-uniform thickness plates, 'different thickness' (DT) and 'tapered plate' (TP), were introduced to decrease the amount of welding. The DT plate is formed in one or two thickness variations in the direction of rolling by a special rolling technique. The TP plate is formed in a continuous variation of thickness in a similar manner. To overcome the disadvantages of cracking of high tensile strength steels, low well crack sensitivity steels (SW and CF steels) were developed. Plates in these materials can be welded with a reduced preheat or none at all. To avoid lamellar tearing in plates which are stressed in the thickness direction, a specially treated steel with a high through-thickness ductility has been developed by desulphurising, degassing, etc. These new plates have now been used as transverse bulkheads, bilge strakes and other crack-sensitive areas.

  • Supplemental Notes:
    • International Conference on Structural Design and Fabrication in Shipbuilding, London, 18-20 Nov. 1975.
  • Corporate Authors:

    Welding Institute

    Abingdon Hall
    Cambridge CB1 6AL,   England 
  • Authors:
    • Uzawa, T
    • Takeshi, Y
  • Publication Date: 1975-11

Media Info

  • Features: References;
  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00148476
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Paper No. 3
  • Files: TRIS
  • Created Date: Feb 23 1977 12:00AM