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24-06-2010, 21:53
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#1
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Registered User
Join Date: Aug 2009
Location: oriental
Boat: crowther trimaran 33
Posts: 4,414
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Where to Find Bronze Flat Bar for Chainplates ?
I want to replace my chainplates with bronze, but I can only find stainless flat bar. I can find round silicon bronze though, would that work for a chainplate?
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24-06-2010, 22:15
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#2
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Registered User
Join Date: Mar 2003
Location: Philippines in the winters
Boat: It’s in French Polynesia now
Posts: 11,368
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Where on "earth" are you located?
'Alaska Copper and Brass' here in Seattle.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
The measure of a man is how he navigates to a proper shore in the midst of a storm!
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24-06-2010, 22:32
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#3
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Long Range Cruiser
Join Date: Dec 2007
Location: Australian living on "Sea Life" currently in England.
Boat: Beneteau 393 "Sea Life"
Posts: 12,822
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Is bronze the right metal for chainplates?
*not that I know, of course!*
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24-06-2010, 22:42
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#4
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Registered User
Join Date: Mar 2003
Location: Philippines in the winters
Boat: It’s in French Polynesia now
Posts: 11,368
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Quote:
Originally Posted by MarkJ
Is bronze the right metal for chainplates?
*not that I know, of course!*
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Whatca think? What's good for propellers should be good for chainplates.
Maganese - Nickel Aluminum Bronze (Aqualloy) vs. Stainless Steel in Marine Propellers
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
The measure of a man is how he navigates to a proper shore in the midst of a storm!
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24-06-2010, 23:25
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#5
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Registered User
Join Date: Jun 2010
Boat: Far East Mariner 40
Posts: 303
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I'm not familiar with aqualloy, but regular bronze is too soft and weak to use for chainplates. I think even thick aluminum or galvanized steel would be better if you're looking to save money. I'm biting the bullet and using stainless to replace mine. Chainplates are about the last thing I want failing on my boat.
__________________
I do all my own stunts.
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24-06-2010, 23:59
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#6
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Registered User
Join Date: Feb 2008
Location: Seattle, WA
Posts: 262
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25-06-2010, 04:59
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#7
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Senior Cruiser
Join Date: Oct 2007
Location: 29° 49.16’ N 82° 25.82’ W
Boat: Pearson 422
Posts: 16,306
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Second the recommendation for Onlinemetals.com. Just replaced my chainplates and ordered from them. Good service and shipping from WA to FL was not bad at all.
If you decide on bronze I did not see bar stock in their catalog. Guess you could get 1.5" rod and machine it down flat. I just used 316 stainless.
__________________
The water is always bluer on the other side of the ocean.
Sometimes it's necessary to state the obvious for the benefit of the oblivious.
Rust is the poor man's Loctite.
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25-06-2010, 05:12
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#8
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,139
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__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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25-06-2010, 05:43
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#9
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Registered User
Join Date: Oct 2009
Location: Melbourne, Florida
Boat: Belliure Endurance 35
Posts: 124
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I've ordered bar stock from McMaster-Carr online before. I ordered 316 stainless for my chainplates, but they have a large selection so they may have bronze. Shipping was fast, but they seemed a little pricey.
As far as bronze for chainplates, I don't know either way. But my turnbuckles are bronze so maybe it's good for chainplates.
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25-06-2010, 05:55
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#10
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Registered User
Join Date: Sep 2006
Location: Toronto
Posts: 223
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Don't use bronze! These chainplates are almost 60yrs old and will give way any second now.
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25-06-2010, 08:17
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#11
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Registered User
Join Date: Jun 2010
Boat: Far East Mariner 40
Posts: 303
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I stand corrected. There are bronze alloys which are very suitable for chainplates.
__________________
I do all my own stunts.
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25-06-2010, 08:33
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#12
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Registered User
Join Date: Jun 2006
Posts: 724
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That's all they had before stainless came on the scene other than iron, or galvi. steel
most wooden boats of yesterday had silicon bronze chain plates. we had hull # 1345 lightning built in 1945 all hardware was cast silicon/naval bronze and the chain plates were flat bar bronze!!!!!! i mean really if they make turn buckles out of the stuff would you think it would suffice for chain plates. it is actually better than stainless because with bronze bolts you don't get electrolysis only a green patina, that can discolor your hull. you can get it but it is a lot more expensive than s.s., that's why i opted for s.s. drilled, ,rounded tops, bent, and polished them my self at home. all my chain plates are 3/8" by 2" 304 s.s. 304 is easier to drill than 316 and is what was orig. equip on boat from factory. i went over size because we are heading off shore and wanted the extra security
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25-06-2010, 09:43
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#13
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Registered User
Join Date: Aug 2009
Location: oriental
Boat: crowther trimaran 33
Posts: 4,414
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Thanks for all the info! I realize the bronze alloy matters, but there are a number of suitable ones.
I like bronze because it won't fatigue, and will therefore last longer than stainless. The problem is where to get it.
In any case, stainless is probably strong enough, and I can always increase the thickness to make them last longer.
Then again, there is the possibility of carbon fiber.
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25-06-2010, 09:53
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#14
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CF Adviser
Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
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Quote:
Originally Posted by geckosenator
Then again, there is the possibility of carbon fiber.
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Yeah, but you'd have to paint the carbon fiber to protect against UV. A better idea would be to go with teak chainplates which you'd only have to varnish every spring.
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cruising is entirely about showing up--in boat shoes.
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25-06-2010, 09:55
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#15
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Registered User
Join Date: Jun 2006
Posts: 724
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gecko i just googled bronze flat bar there is a web page from wooden boat forum with same question more or less and the quote was from McMaster for $88. for a 1/4 by2" by6' this was a 2006 quote for aluminum-bronze good luck
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