The stainless steels often used for propeller shafts include Types 303, 304, 316, and 630. (which is also known as "17-4 PH"). Stainless in salt water is more-or-less subject to pitting which leads to crevice corrosion. Types 303 and 304 are probably worse in this respect, with type 316 being less susceptible, and therefore better suited to salt water use. The 630 type is very close to K-500 Monel as far as corrosion resistance. It costs more than the other stainless types, is stronger, and is less subject to corrosion. of course you also have the aquamet series of shafting material which is quite corrosion resistant and strong but priced like gold.... and from my opinion not worth the cost unless the boat is neglected and sits alot...! as far as carbon fiber for shafting material, if uniflite still has navy contracts they might use it as we all know it is US, the tax payer who is footing the bill and the government loves spending our money but I doubt carbon fiber would be used on recreational vessels...
eric ----- Original Message ----- From: Neta Graf<mailto:[email protected]> To: [email protected]<mailto:[email protected]> Sent: Monday, October 19, 2009 2:46 AM Subject: [UnifliteWorld] Re: Uniflite Shaft Material My son work;s at All American Marine, which is right down the street from the Uniflite plant in Bellingham. Nathan just told me that they were using carbon fiber for there drive shafts. Im a retired Fitter and I would bet on ss tubing . I have a 1957 Uniflite 18 ft.with a cabin ,in colo.where it is dry(no dry rot) Tim Graf [email protected] --- On Sun, 10/18/09, "Reel Estate" <[email protected]> wrote: From: "Reel Estate" <[email protected]> Subject: [UnifliteWorld] Uniflite Shaft Material To: "UnifliteWorld" <[email protected]> Date: Sunday, October 18, 2009, 10:21 AM Greetings: Does anyone know what Uniflite used for shaft material? I have a 1983 38C with 454's that I am repowering to Cummins 6BTA 5.9 370's and I'm trying to determine if I can use my existing 1.75" shafts. I've read that some builders were using Seaaloy (which was the previous name for Aquamet) in this era. I don't find any markings on the shafts so I am assuming they are SS304. Any help would be appreciated. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en -~----------~----~----~----~------~----~------~--~---
