Accession Number:

ADA454173

Title:

The National Shipbuilding Research Program. 1992 Ship Production Symposium Proceedings. Paper No. 7C-1: Aluminum Steel Construction in a New 36M (120 Ft) Patrol Boat

Descriptive Note:

Corporate Author:

COAST GUARD BALTIMORE MD FIELD TESTING AND DEVELOPMENT CENTER

Personal Author(s):

Report Date:

1992-09-01

Pagination or Media Count:

11.0

Abstract:

Construction of the U.S. Coast Guard Cutter Leopold, the lead ship of the 36 m 120 ft Heritage Class, is discussed. A new Structural Critical Aluminum-Steel Transition SCAST product, Duratemp II was selected for the welding transitions between the aluminum deck house and steel deck. The explosion bonded materials higher strength and toughness permitted use of lighter, narrower transition joints 1 cm 0.375 wide x 2 cm 0.75 thick than are permissible with traditional materials. The unique heat resistance of the material permitted cutting and welding of the small section joints without overheating. The need for corner butt joints was reduced due to the products reliable bendability. Welding procedures and Quality Assurance procedures are discussed in detail. fabricability, and proven corrosion resistance. This was the first shipboard installation to use this material. The USCG, in cooperation with the manufacturer, chose a 1 cm 0.375 wide x 2 cm 0.75 thick transition joint for use in joining the pilot and deck-house to the steel deck. Fabrication of traditional AluminumSteel transition joint materials using bars of this small of a cross-section is generally considered unreliable. Traditional aluminumsteel transition joint products can be significantly degraded if the bond zone is heated above 260 degrees C 500 degrees F during welding.

Subject Categories:

  • Metallurgy and Metallography
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE