Cold water construction specs

Discussion in 'Boat Design' started by ted655, May 18, 2007.

  1. ted655
    Joined: May 2003
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    Location: Butte La Rose, LA.

    ted655 Senior Member

    I "love" to watch "Deadlyest Catch". Crabbing in the Bearing Sea, brrrr!
    I know there is different steel grades & welding schedules for artic boats. What I don;t know is the issues an alumomium trawler might face. Is alumonoum suitable for freezing waters? Is there a "class" or spec the boat (125' lol), it would bee built to? I assume insurance carriers have a say in this.
    An all alumomium crab trawler, what a great idea, I think.:rolleyes:
     
  2. kc135delta
    Joined: Jun 2006
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    Location: Eastern Europe, for now

    kc135delta Junior Member

    Just the thought of ice would make me choose steel over alum.
     
  3. lazeyjack

    lazeyjack Guest

    yes the colder it gets the stronger aluminium becomes, its a fact, there is no charge for this Gem of info:))
     
  4. ted655
    Joined: May 2003
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    Location: Butte La Rose, LA.

    ted655 Senior Member

    :confused: Stronger to the point of brittal?
     
  5. lazeyjack

    lazeyjack Guest

    no, not at all, there are many successful alloy sailing yachts go s down there from NZ, Peter Blakes Seamaster was one of them
     

  6. marshmat
    Joined: Apr 2005
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    Location: Ontario

    marshmat Senior Member

    There are plenty of aluminum vessels that are built for icy conditions. S/V Seal http://expeditionsail.com/ comes to mind as an example, albeit a bit smaller than what you're talking about.
    Aluminum does become weaker at elevated temperatures; whether it becomes stronger in the cold is not an aspect of the material of which I am aware.m I'm pretty sure it doesn't become weaker in the cold.
    I would suggest digging out the classification society books- Lloyds, DNV, ABS etcetera- for this one. For ice work it seems the usual practice is to take the strictest of the class society rules on each individual topic, and ensure that every requirement is exceeded by a fair margin.
     
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