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Old 20-05-2011, 21:49   #1
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Broken Rigging - Photos and Stories Please

insurance companies demand 10 years max on standing rigging because 316 fails due to stress corrosion cracking. (australia is 5 to 7 years and ALL replaced.

this is insane.





Stress Corrosion Cracking;
is the heart of the matter.

Stress corrosion cracking starts at 17 degrees C in 316 in sea water.

Stainless was invented 100 years ago (no electricity, no television, no cars, people drove horses, lived in caves etc)

Almost ALL 316 and 304 rigging failures are from Stress Corrosion Cracking






Super Stainless
on the other hand, the new super stainlesses were built recently by modern metalurgy and have TWICE the strength and suffer no stress corrosion cracking.

talking about 2205 Duplex stainless


if you build your rigging out of the right stuff, it will last forever.

the same part built out of 2205 will be twice as strong, and so will undergo one quarter of the stress.

the most important thing though is there is NO stress corrosion cracking, and so the life expectancy of the part increases to 100's of years instead of mear years.







JFYI,

they build anchors out of 2205

chain

wire

rigging parts

and i've heard lots of peeps round the net building their chain plates out of 2205







Things to talk about;
whats wrong with rigging companies?

are they brain damaged?

why do they build out of such inferior materials? when it is so EASY to avoid all these problems? does ANY single one of them employ a metalurgist? or an engineer?

i refuse to believe they do not know about super stainless (duplexes 2205/2207)

do they WANT people to change their rigging every 10 years? (to comply with the demands of insurance companies)

who out there knows the real story?







anyhow,
currently building 16m cat, it is my intention to do it once, and do it properly, and NEVER replace any of it.

All the rigging is going to be 2205. but you really have to work to find the bits and pieces.

i'll probably have to have the swageless terminals custom made for me out of 2205






18 threads only here mention 2205, and i can't understand why.

so i started this thread for two reasons;

to get links off people if you know anywhere that has 2205 rigging parts
and
to get photos of failed 316 rigging parts.



and have a nice day
mal.
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Old 20-05-2011, 21:51   #2
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pics and scary stories

broken chain plate bolts
Chainplate Inspection?


help with broken backstay


Scary Rigging Moment Today - Please Advise


heaps of chain plate failures on this site (cruisers forum

heaps of toggle failures on this site (cruisers forum




external sites

Sailboat Rig Problems - J. Stormer

http://www.svsoggypaws.com/images/wo...NewToggles.JPG


turnbuckle toggle crack | Flickr - Photo Sharing!

Ocean Navigator | The magazine for long-distance offshore sailing and power voyaging






all of the above Versus


Duplex Stainless 2205 - Best Stainless
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Old 20-05-2011, 21:53   #3
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Links

remember; please post links for

ANY Super stainless (not just 2205 but ANY super stainless boat bits - nitronic 50, aminox255, 904, 2207 etc etc etc


Anchors
Rocna anchors: winning tests and the trust of sailors in the real world
Delta Anchor Stainless Steel


Cromox anchor chain
Anchor chaine in stainless steel calibrated
BRIDCO - Stainless Steel Hardware and Wire Rope Fittings
Boat anchor chain - Niro - Petersen



Loos Co make wire rope,
Domestic Stainless Steel and Galvanized Wire Rope - Loos & Co. Inc., Pomfret, CT USA
Sandvik
advancedmetals.com



Blue wave make 2205 rod rigging
Blue Wave Rigging Hardware







general info on Stress Corrosion Cracking
Stainless Steel - Corrosion Resistance

general info on all the different common stainless grades
Chemical & Mechanical
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Old 21-05-2011, 01:38   #4
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Re: broken rigging photos and stories please

what is the comparative cost of this 2205 stainless and is using it recognised by insurance companies?

It may be better and It may be cheaper in the long run however Insurance companies by nature are highly risk adverse and if any new fangled technology is not proven or still deemed a risk they wont allow it (even if the early birds are keen as mustard)
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Old 21-05-2011, 08:25   #5
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Re: Broken Rigging - Photos and Stories Please

Quote:
Originally Posted by PooBeetle View Post
the most important thing though is there is NO stress corrosion cracking, and so the life expectancy of the part increases to 100's of years instead of mear years.
Good for you if you can sail that long
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Old 21-05-2011, 09:50   #6
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Re: Broken Rigging - Photos and Stories Please

Quote:
Originally Posted by PooBeetle View Post
insurance companies demand 10 years max on standing rigging because 316 fails due to stress corrosion cracking. (australia is 5 to 7 years and ALL replaced.

this is insane.
Any links to relevant insurance requirements perhaps?

If they do, I will count this as a plus towards these companies. Otherwise the owner of a well maintained boat will pay for all those age unknown rigging failures.

Age unknown - pronounce: "too old, and owners did not care - the were insured, after all".

b.
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Old 21-05-2011, 11:23   #7
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Re: Broken Rigging - Photos and Stories Please

My insurance company has no such requirement. My standing rigging is 11 years old and they are ok with it. I inspect it carefully every year and it is still in top shape.

Probably because the previous owners didn't spend much time at sea -- I'm making up for lost time and am probably accelerating wear!
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Old 26-05-2011, 19:23   #8
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6 months old!

You?
You say Bono. I say he's credible,
You say McDonalds. And, I say edible,

You say art. I say it's relevant,
You say rock. and I say intelligent.

You,
You say religion. I say pacifism
You say quality, I say TISM!








Generated datasheet of Seamless tube and pipe - SAF 2205

note at what temperature 316 fails with stress corrosion cracking

the MacDonalds of the boat builders

cheap yacht builders,
cheapskate manufacturers,

cheapskate rigging manufacturers
as cheap as they can get away with



6 months old!
Response to shroud breakage | Camomile












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