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

Tue Oct 22 18:23:10 EDT 2013

Jim,
A537 was used extensively, as well, especially in the early boats that Perry built. Maybe you can figure it out. It seems that I recall being told that it was somewhat harder to weld but had better cold-water-under-pressure properties. Maybe Dr. Nuytten would weigh in on this, assuming he isn't up to his ass in DW3000 alligators this week (which I suspect he is).
Vance

-----Original Message-----
From: JimToddPsub <JimToddPsub at aol.com>
To: personal_submersibles <personal_submersibles at psubs.org>
Sent: Tue, Oct 22, 2013 4:18 pm
Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull

Greg,
I should have clarified that.  It was a cut-and-paste from a web site.  I'm more of a librarian in that I save info in an organized fashion when I come across it so I'll have it available later when the need arises.  That was the case in this instance.
Jim

In a message dated 10/22/2013 1:25:34 P.M. Central Daylight Time, jgcottrell2002 at yahoo.com writes:

Thanks for the info, Jim.   It's good to know there is some one in the group that is also in the steel   industry.

Greg

From: "JimToddPsub at aol.com"   <JimToddPsub at aol.com>
To: personal_submersibles at psubs.org   
Sent: Tuesday, October 22,   2013 12:59 PM
Subject: Re:   [PSUBS-MAILIST] Best Steel to use for Sub Hull

Maybe more detail than you really want to know, but here   goes:

ASTM A 516 or ASME SA 516 grade is one of the most   popular steel grades in market . 

It is primarily   intended for use in welded pressure vessels where notch toughness is   important. It comes in four grades 55, 60, 65 & 70. At Oakley Steel we   mainly sell 516 gr 60 and 516 gr 70. These grades cover a range of tensile   strengths from 55 - 90 MPa and this versatility explains much of the   specifications popularity. 

For plates thinner   than 40mm we normally supply them as rolled. Plates supplied above 40mm thick   are normalised. 

For A 516 grade 70, which is one   of our most popular steels, the ASME standard composition is as follows   (dependent on grade): 

Carbon 0.27 - 0.31% 
Manganese 0.79 - 1.3% 
Phosphorous 0.035% max 
Sulphur 0.035% max 
Silicon 0.13 - 0.45% 

In a message dated 10/22/2013 11:53:12 A.M. Central Daylight Time,   jonw at psubs.org writes:

Generally, A516gr70     suffices for personal or recreational submarines.

Jon

On 10/22/2013     12:45 PM, Christopher Cave wrote:

Hello, 

What       is the best steel to use for a submarine hull. Someone mentioned marine steel such       as 316,316L or 317. Any suggestions or a website I can review.

Thanks,

Chris 

Christopher Cave 

christophercave at yahoo.com

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