Guidelines - YP47 Steel for Hull Structures

Friday, October 31, 2008

The first large sized container carrier in the world to use a new grade of higher tensile steel in its hull structure with a specified yield point of 47 kgf/mm (460N/mm) was built to NK class and delivered in June 2007. Known as YP47 steel, this comparatively strong and tough material is currently attracting much attention as an effective solution to the challenges presented by the use of extremely thick steel plates in the construction of the hull structures of container carriers that have been growing ever larger in size in recent years.

ClassNK prepared these guidelines drawing upon the results of many years of research conducted into the practical application of YP47 steel and the experience gained from actual use of the material in the construction of large size container carriers. The publication sets forth comprehensive technical guidelines on the application of YP47 steel, including specifications on the hull girder strength, fatigue strength and other factors affecting hull structural strength, as well as material specifications and requirements for welding procedures, fabrication and related work carried out during construction. The Guidelines also include provisions on brittle crack arrest design that serve as a backup safety measure for preventing brittle fracture in the event of brittle cracking.

As container carriers continue to grow ever larger in size and effective means are sought to address the related safety concerns accompanying such growth, it is hoped that these guidelines will come to be widely used and thus contribute to enhancing the structural integrity and safety of large and ultra large container carriers now and in the future.

The guidelines can be downloaded from the ClassNK website at www.classnk.or.jp.

Maritime Reporter September 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

News

Total CEO Plane Crash: Russian Prosecutors Detain More Suspects

Russian prosecutors detained four Moscow airport workers and denied bail to the driver of a snow plough which hit a private jet killing the CEO of French oil company Total earlier this week,

Yara Reports Strong 3Q Results

Yara International ASA delivered strong third-quarter results, with record fertilizer deliveries and continued margin benefit from lower European gas price. "Yara

Bright Outlook for BWM Convention

The Danish Maritime Authority informed that the Ballast Water Management Convention is now one step closer to ratification following last week’s meeting of United

 
 
Maritime Careers / Shipboard Positions Maritime Standards Offshore Oil Pod Propulsion Port Authority Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0972 sec (10 req/sec)