Guide for steel hull welding.pdf

Guide for Steel Hull Welding ANSI/AWS D3.5-93R An American National Standard Keywords — Steel, steel hull welding, ship welding, ANSI/AWS D3.5-93 hull design, hull construction, marine An American National Standard construction, vessels, offshore guide Approved by American National Standards Institute April 29,1992 Guide for Steel Hull Welding Superseding AWS D3.5-85 Prepared by AWS Committee on Welding in Marine Construction Under the Direction of AWS Technical Activities Committee Approved by AWS Board of Directors Abstract This guide provides information to users in the marine construction industry as to the best practical methods to weld steel hulls for ships, barges, mobile offshore drilling units, and other marine vessels. This guide provides information on steel plates, shapes, castings, and forgings; their selection; and their weldability. It discusses welding processes and proper design for welding. Hull construction is presented in terms of preparation of materials, erection and fitting, and control of distortion. Qualification of procedures and personnel are outlined, and inspection methods are discussed. A common shipyard problem, stray current protection, is discussed as is the health and safety of the work force. Supplementary nonmandatory appendices are provided for informational purposes. American Welding Society 550 N.W. LeJeune Road, P.O. Box 351040, Miami, Florida 33135 Table of Contents Page No. Personnel iii Foreword iv List of Tables vii List of Figures vii 1. Materials 1 1.1 Steel Manufacturing Processes 1 1.2 Higher Strength Steels 5 1.3 Notch Toughness Properties of Steel 5 1.4 Notch Toughness of Weld Metal and Heat-Affected Zone 8 1.5 Fatigue 10 1.6 Specifications for Steel 13 1.7 Specifications for Welding Consumables 15 1.8 Selection of Materials 15 1.9 Weld Cracking 15 1.10 Service Performance of Welds 17 1.11 Welding of Higher Strength and Low-Temperature Service Steels 19 1.12 Welding of Clad Steel 19 1.13 Explosion Bonded Transition J