[PSUBS-MAILIST] overlay welding

[Alec Smyth via Personal_Submersibles]

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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