Has anyone changed out their stainless chainplates for Dyneema? Using Dyneema in lieu of 1x19 standing rigging?
From a web search:... "Technically classified as ultra-high-molecular-weight polyethylene (UHMwPE), Dyneema® fiber is produced by extruding a UV-resistant polyethylene gel through a spinneret. In a patented process, the fiber is drawn, heated, stretched and cooled. The result is a filament in which exceptional long-chain molecular alignment is paired with high crystallization, limiting density while allowing for unusual load dispersion. At one-thousandth of an inch in thickness, Dyneema's® outstanding strength-to-weight ratio makes it the strongest fiber in the world.
15 times stronger than high-quality steel, lightweight, extremely durable, waterproof and resistant to UV light and chemicals, Dyneema® fiber is increasingly used in industries where strength and dependability matter most—from military and law enforcement (personal and vehicle armor), the maritime industry (mooring ropes), and commercial fishing (lines and nets)."
Dyneema is indeed a wonderful fiber and exhibits extreme strength compared to more traditional fibers. There are many suitable places to utilize Dyneema on most any boat.
That being said, Dyneema does not practically lend itself to applications like chain plates and replacing standing wire rigging on a 20,000 pound overbuilt cruising sailboat. There are no off the shelf end fittings to terminate Dyneema to standing rigging attachment points. The cost to make such a change would exceed the typical value of a 365 by multiples. The vast majority of new high dollar yachts today still utilize conventional stainless chain plates.
If you want to install some Dyneema aboard you can do so by replacing your halyards with Dyneema core polyester jacked line. The strength of the core will allow you to drop the line size by a minimum of half and probably still double the working load.
The most suitable switch might be installing Dyneema lifelines in place of the traditional stainless cable. Everything will have to be tied at the ends but they will be far stronger and will not rust.
Dale