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

[greg cottrell]

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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