Thursday, April 5, 2012

Titanium Chainplates - the future....

Just read my second magazine article about Titanium Plates and it all seems to make sense.

• High strength to weight ratio,
• Low Density – approximately half the weight of steel,nickel and copper alloys,
• Inherent Flexibility – an elastic modulus that is approximately 55% of steel,
• Extended Fatigue Life – more than twice that of steel,
Exceptional Corrosion Resistance – resists chlorides, seawater, sour and oxidizing environments,
• Superior Erosion Resistance – erosion corrosion, cavitation and impingement in flowing turbulent fluids,
• Non‐magnetic.

First I pulled the existing chainplates.  Not a major job as I had already removed most of my hull panels and when I replaced them I left the chainplate bolts accessible and exposed.  Keep in mind also that I have no Mizzen.

The little guy on the right is an upper mast tang.

Before you take measurements off Teds original plans or use one of the plates as a template for the rest, ask yourself the  question;  "Do you feel lucky, Punk".  A lot of the holes line up, some don't.

It will be no fun refilling the existing holes in the fiberglass and re-drilling them.

I will probably order Grade 5 (Ti-6Al-4V) Titanium with sand blasted finish.  Interestingly someone suggested that the polished finish is too shiny while the blasted finish is cheaper and holds the deck sealant better.

Allied Titanium


Ocean Dove said...

If the original chain plates last 25 years or more is the extra expense of Titanium necessary so they can now last 50 years or more?
just a thought.

The Incredible Hull said...

Yes, But I worry about the one that only lats 10 years because of crevice corrosion. A 30% premium does not appear too for this peace of mind. I will admit to a certain level of neurosis about chain plates.

Robert Sutton said...

I'm with you on the titanium. Wish I thought of it a couple years ago before I installed mine. If a stainless plate is gonna fail, it will at the worst time (in a blow) and the ensuing disaster could be cascading (losing a rig). Yes, worth the extra peace of mind.

Christopher Grreimes said...

Actually, Titanium is corrosion free in the natural environment, so titanium chainplates would last virtually indefinitely.