Titanium Gr5 versus Monel K500 Bolts in Sea Water

Q: I have a subsea application that is exposed to extremely rapid moving salt water. Not only is it faced with these corrosive conditions but it must also be strong – 150 ksi  tensile strength – in order to withstand these rough waters and maintain the structure’s integrity. Can you help? We had tried Titanium grade 5 but it did break over time.
A: For your situation of salt water corrosion, rapidly flowing water and strength, I would suggest trying Monel K500. Monel bolts are the go to for many marine applications for the corrosion resistance to seawater. In addition, they do very well in rapid seawater. Finally, Monel K500 bolts will be stronger than titanium bolts with a tensile strength of 160ksi, compared to 148ksi of titanium.
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