[PSUBS-MAILIST] exotic steel

[Jon Wallace via Personal_Submersibles]

Yes, I used .8 as the usage factor for a516-70.  Until you know what the 
minimum thickness of a formed head is the numbers have to be considered 
approximate anyway.  For example, .75 inch HY-100 will clearly get Scott 
where he wants to go, but I don't know if that would require 1 inch 
plate or 1.25 inch plate to ensure a minimum thickness of .75 inch after 
forming.

I like your program Sean.  Looks like there's a bug in it 
though...everything displayed in metric.  :)  Where do I make a 
"feature" request for english unit output?

Jon


On 5/1/2015 11:44 AM, Sean T. Stevenson via Personal_Submersibles wrote:
> FYI:  This is for a 72" sphere with 1.25" thick material.  Where this 
> may differ from Jon's calculation is that the Usage Factor, eta, used 
> in this program is 0.67 as specified by ABS.  Jon apparently used 0.8, 
> which increases conservatism.
>
> Sean
>
>
>
>
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