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Re: [PSUBS-MAILIST] Another stupid question.

To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Another stupid question.
From: "Daniel Lance" <lanceind@earthlink.net>
Date: Tue, 29 Apr 2008 20:26:57 -0400
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Hi Jim,
200 degrees F. Give the steel a good "soak" with the torch. Do you have any
temperature sensitive crayons. " Tempil" is a common brand.
Dan


> [Original Message]
> From: Jim Kocourek <kocpnt@tds.net>
> To: <personal_submersibles@psubs.org>
> Date: 4/29/2008 10:59:11 AM
> Subject: Re: [PSUBS-MAILIST] Another stupid question.
>
> Hi Dan,
>
> I have an unrelated general question. I am going to be adding some weld
at 
> the shoulder of the cylinder where the conning tower junction is located.
I 
> am using flux core shielded .45 wire.
>
> The base of the conning tower is 1 inch thick grade 70 and the sub hul is 
> 1/2 inch grade 70 steel. I know that the right way would have been to
finish 
> it right away, but I was called away.
>
> Can you give me your thoughts on the ideal preheat temp to use when going 
> back at it.
>
> Best Regards,
>
> Jim K
> ----- Original Message ----- 
> From: "Daniel Lance" <lanceind@earthlink.net>
> To: <personal_submersibles@psubs.org>
> Sent: Monday, April 28, 2008 5:59 PM
> Subject: RE: [PSUBS-MAILIST] Another stupid question.
>
>
> > Hi James,
> > If you are " Mig" welding you must use Flux core wire with a cover gas
( "
> > Dual Shield" ) tensile strength of the wire must be 70,000 psi. Regular
> > hard wire mig is not appropriate for pressure vessel work.
> > If you want to "Stick" weld then you must also use a 70,000 tensile
> > strength rod , like E7018, or E7010( These two are the easiest to use to
> > make out of position welds). Never use an E60 rod on 516gr70 steel meant
> > for low temperature pressure vessel service( actually never on 516gr70
> > steel) , All welds should be full penetration with back gouging of the 
> > root
> > and then back welded.
> > Dan Lance
> >
> >
> >> [Original Message]
> >> From: <james@guernseysubmarine.com>
> >> To: <personal_submersibles@psubs.org>
> >> Date: 4/28/2008 9:03:21 AM
> >> Subject: [PSUBS-MAILIST] Another stupid question.
> >>
> >> Hi All.
> >>
> >> I know this question will have come up before but im going to ask
anyway.
> >>
> >> I've been busy this weekend cutting and fitting hull viewports.  You
can
> > look here.
> >>
> >> http://www.guernseysubmarine.com/index_files/Page10371.htm
> >>
> >> I am mig welding most things on my project but, with the hull
viewports,
> > i have now found that i cannot get the mig gun in at the correct angle
> > between the port and the reinforcing rings on the inside.  Its still
> > awkward, but i think i can get it with a stick.
> >>
> >> I will have to borrow an inverter set so im waiting until ive done all
4
> > and then i'll borrow the set and do them all in one go.
> >>
> >> The question is.........What electrodes do you guys suggest?  I was
> > thinking of E6012.  2.5mm
> >>
> >> What do you think?
> >> Thanks
> >> James
> >>
> >>
http://www.mylincolnelectric.com/Catalog/consumabledatasheet.aspx?p=8333
> >>
> >>
> >
> >
> >
> >
> >
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>
>
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