[PSUBS-MAILIST] Best Steel to use for Sub Hull

[Hugh Fulton]

Hi Phil,  Thanks for that.   I would think that the benefits would outway the cost increase.  I am fighting weight and balance all the way.

Chs  Hugh

 

 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of cast55 at telus.net
Sent: Thursday, 24 October 2013 3:01 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull

 

What were the specific challenges that you had to overcome to properly weld HY-80?

Sean

 

Phil Nuytten <phil at philnuytten.com> wrote:

Hi, Hugh

As Vance says, HY80 is somewhat challenging to weld – err, actually, that’s an understatement. We had to work with our fabricators to come up with a whole weld procedure to satisfy our classing agency. If you decide to go this route, let me know and we will share that procedure.

Phil

 

From: vbra676539 at aol.com 

Sent: Tuesday, October 22, 2013 7:18 PM

To: personal_submersibles at psubs.org 

Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull

 

I think it is somewhat demanding to weld, and expensive by comparison, of course. That said, there is a mountain of data available, as the pressure hulls of most modern US Navy submarines are built out of it.

Vance

-----Original Message-----
From: Hugh Fulton <hc.fulton at gmail.com>
To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org>
Sent: Tue, Oct 22, 2013 10:15 pm
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull

Vance,  Yep that sounds about right.

Are there any nasties to using it?

Chs Hugh

 

 

 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org?] On Behalf Of Vance Bradley
Sent: Wednesday, 23 October 2013 1:37 p.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull

 

Hugh,

HY-80 used to maintain the standard dimensions of a DW2000 with 50% depth increase.

Vance

Sent from my iPhone


On Oct 22, 2013, at 8:13 PM, "Hugh Fulton" <hc.fulton at gmail.com> wrote:

Vance,  I am sure I saw recently from Phil that he was using HY 80 but I don’t know what on.  I did a calc on mine and I got a lot deeper using the HY 80 specs over the Grade 70.

Hugh

 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of vbra676539 at aol.com
Sent: Wednesday, 23 October 2013 11:55 a.m.
To: personal_submersibles at psubs.org
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull

 

One other thing comes to mind on this. Phil uses A516Gr70 in the DW2000s. It occurs to me that if there was a demonstrable benefit to A537, he would have used taken advantage of it. And he didn't, apparently. Interesting. Don't know why, though. Maybe it has something to do with welding stainless inserts in and the heat treatment thereof. Just a guess.


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