[PSUBS-MAILIST] overlay welding

Mon Nov 14 20:22:26 EST 2016

Alec,Okay, 316 it is.  The lathe is pretty simple because it is being built for one job and one size, and will not be pretty ;-)  hmmm maybe I will paint it Hank 

    On Monday, November 14, 2016 6:08 PM, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 The easy to machine one is 304, but it's rotten at corrosion resistance. I agree with Sean that 316 is it. The machining difficulty with 316 is overcome with patience, but the corrosion problem of 304 you can't do anything about. If I didn't know you Hank, I'd take it with a pinch of salt when someone says they're building a lathe and will be back in a little while with it!

Best,
Alec
On Mon, Nov 14, 2016 at 7:59 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Thanks' Sean,I did look at plating, there is some interesting processes out there.   I am looking for an excuse to experiment with building the lathe.  Is there a softer SS then E316L  that is more machine friendly.   I am not worried about salt water, it would only be in contact briefly.Hank 

    On Monday, November 14, 2016 5:36 PM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs. org> wrote:

 E316L, with coating type appropriate to your machine.  Welding and machining have conflicting material requirements, with the Sulphur, Selenium or Lead additions that make steels easy to machine creating major headaches when welding. E316L will give you the corrosion resistance you're looking for, but will be difficult to machine because it work hardens so readily. If you can, stress relieve after welding (or in between machining attempts) to return the steel to its fully austenitic condition.As an alternative to weld deposition, you could look at plating processes to clad the exposed steel. Electroless Nickel?Sean

On November 14, 2016 5:17:56 PM MST, hank pronk via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
Hi All,I am back to work on Elementary 3000 and first on the list is to overlay weld my hatch seat with stainless steel and machine it down again.  I am building a vertical turret lathe instead of using my flange facing machine.  I am building the lathe as an experiment also for a future project.  My question is, what type of SS wire should I use.  There is a chance that the sub will see salt water.   I need to keep in mind that the material needs to be machining friendly.Hank
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