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.
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
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.
they build anchors out of 2205
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
who out there knows the real story?
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
to get photos of failed 316 rigging parts.
and have a nice day