On a sailing yacht, it is important to choose fittings, and in particular the stainless-steel grade used, to suit the application (rope, mooring, etc.). This will ensure longevity of the equipment and safety on board.
At Wichard we use 4 main families of stainless steel:
- 316L stainless steel
- High strength 17.4 PH stainless steel
- Duplex stainless steel
- And titanium
We chose 316L stainless steel because it offers excellent corrosion resistance and medium mechanical strength. 17.4 PH stainless steel has greater mechanical strength than 316L but less corrosion resistance.
Duplex stainless steel is a new grade offering the mechanical strength of 17.4 PH and the corrosion resistance of 316L, so it is a good compromise.
Finally, titanium is mainly selected for its lightness and high corrosion resistance.
Wichard stainless steel shackles are available in 316L and 17.4 PH stainless steel, and titanium.
Snap shackles, Speedlink trigger snap shackles and quick release snap shackles are mainly available in 17.4 PH stainless steel to give preference to mechanical strength.
Carbine hooks and rigging adjusters are made in 316L stainless steel for corrosion resistance. Wichard swivels are in 17.4 PH stainless steel.
Caution, if your fitting is to be used under water, we advise strongly against using 17.4 PH stainless steel parts; for mooring swivels, we can provide versions in 316L stainless steel.
Info: How can we differentiate between 316L stainless steel and 17.4 PH stainless steel? 17.4 PH stainless steel is magnetic, so in case of doubt you can use a magnet.