dengmech
Mechanical
- Jun 21, 2013
- 14
I am specifying some bolting for a submersible application, the bolts will be submerged about 2 to 3 days then unsubmerged for a couple of weeks. I need 1.5" bolts with a proof strength of no less then 87 KSI. They will only be removed and installed when the equipment is serviced (on the order of every 1 to 3 years). Can someone tell me what is typically used for material corrosion resistance in submerged applications? 316 stainless steel, alloy steel with a PTFE coating? I'm concerned the PTFE coating is very thin and can easily be scratched off. The stainless steel is much better, but much more costly and I am getting into some real specialty fasteners to get the strength.