RE: [PSUBS-MAILIST] o-ring hull penetrations

[Alec Smyth <Asmyth@changepoint.com>]

Carsten,

What steel are you using for the hull? 

-Alec

-----Original Message-----
From: MerlinSub@t-online.de [mailto:MerlinSub@t-online.de]
Sent: Monday, December 11, 2000 1:37 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] o-ring hull penetrations


I forgot to tell: 
The next days I will weld my 
stainless steel hatch seats rings for th main entrance
(700/600 mm diameter, 20mm thickness)
(2,3/1,97 ft diam., 0,8 inch thick)
to the entrance tower pipe. 
(700/672 mm diameter, 14 mm thickness)   

Acording to my weld shop there will be no problems 
with the right wire. Both steel should be not to cold
during welding. For this reason I will heat my garage
on/two hours before start welding. Also I will generate
some extra heat to the first welding start point with a 
hot air gun. 

Carsten

Carsten Standfuß schrieb:
> 
> Phil Nuytten schrieb:
> >
> > Alec:
> >         Make the hull insert out of stainless - it welds well to mild
> > steel.
> 
> Thats the way.. but be careful with the welding stick or the welding
> wire. For my MiG welder I use 3 kinds of wires :
> 
> 1.)Wire for black steel to black steel (all normal kinds of not
> stainless steel)
> 2.)Wire for white steel to white steel (all normal kinds of stainless
> steel)
> 3.)Wire for white steel with black steel (not stainless steel with
> stainless..)
> 
> You should not use 1.) for white steel or for conections between
> black and white. You should also not use 2.) for conections
> between black and white because there is a risk of cracks.
> Only 3.) is for black/white weldings.
> 
> Unfortunalty we have other numbers here for the wires:
> 1.) (black) called here OK Autorod 12.56 as Mig wire 18 Kg rolls
> 2.) (white) called here OK Autorod 16.31 as Mig wire 15 kg rolls
> 3.) (black with white) called here OK Autorod 16.95 as Mig wire 15 kg
> rolls
> number 3.) has also the material number stainless steel 1.4370
> 
> You will maybe find more information on the WWW.esab.com
> or at there office in
> 
> USA
> ESAB Welding & Cuttings Products
> Florence, SC
> Tel. 001 843 669 44 11
> fax. 001 843 664 44 58
> 
> or
> Canada
> ESAB Group Canada Inc.
> Missisauga, Ontario
> Tel.001 905 670 020 20
> Fax.001 905 670 48 79
> 
> I have all other office adress around the world here if nessesary
> 
> During Mig welding the inserts - cover the surface of the insert
> near the welding area with small steel or aluminium plate to protect
> the surface from hot sparks points.
> 
> regards, Carsten