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Go Back   SailNet Community > On Board > Gear & Maintenance > Anchor Chain - Grade 70
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Thread: Anchor Chain - Grade 70 Reply to Thread
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Topic Review (Newest First)
05-13-2009 07:51 PM
downeast450 I ran into the problem of buying lighter weight high tensile anchor chain only to "discover" that the reduced size, and weight, of the chain would only allow shackles to fit that were much weaker than the high tensile chain's rating.
05-13-2009 09:11 AM
sailingdog One thing about the High-test grades of chain, like G43 and G70, you have to examine the links for distortion if the chain is ever exposed to very high stresses...the links can deform and fail rather suddenly when loaded a second time. While this is true of all chain, it is particularly applicable to high-test chain.
05-13-2009 02:35 AM
sailak Oh.
05-13-2009 01:44 AM
Craig Smith It is in the table on the page linked to directly above your post.
05-13-2009 01:37 AM
sailak Speaking of weight, where can I find how much 5/16 HT chain weighs per foot? Google hasn't provided me a source.

Thanks.
05-11-2009 11:12 PM
Craig Smith G70 is not high enough to get away without galvanizing, and it is possible to obtain hot-dipped high tensile. It's often branded as "transport" chain in the US, don't know where you are. The galvanizing reduces the tensile strength a little, which is factored into the WLL figures.

As SD implies, you will also require calibrated chain if it's to be used on a windlass gypsy, it doesn't sound like the finishes you mention are likely to be.

High tensile is a good idea as it allows a considerable amount of weight to be saved from the bow of the boat.

There is more info on grades and sizing for anchor chain here, it's an attempt at a fairly complete guide to selecting chain for anchor rode:
Chain (Rocna Knowledge Base)
05-11-2009 01:21 PM
sailingdog You really want hot dipped galvanized chain for an anchor. Also, if you have a windlass, you need to get whatever chain the gypsy on it is designed for.

Do not use stainless steel anchor chain. Stainless steel is subject to crevice corrosion and other issues, and the welds on it can fail suddenly under load in a marine environment.
05-11-2009 12:51 PM
Freerider
Anchor Chain - Grade 70

I can get a good price on G70 chain, but its not galvanized, it only comes in satan finish or Dichromate (gold) plated.

Is this a major factor? Is hot-dipped galvanized or SS needed for a good anchor chain?

 
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