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Re: Notch Tough Welding Metal

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>What does this mean to a fabricator? Does he have order special welding 
>rods to meet this requirement? Are their special welding procedures also?
The answer is basically yes to both. You need to order consumables with a 
minimum Charpy impact values and you need to watch your process variables 
and cleanliness. It really isn't a big deal. Measures needed to produce 
high toughness welds have been well-known and proven in practice for 
about 30 years.

You can check the Lincoln web page <> for 
particulars on procedures and consumables. If it were my fabricator and 
he didn't know about such matters, I'd probably find another fabricator. 

Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw(--nospam--at)        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)

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