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pasofino
12-20-2010, 07:46 PM
Can 304 stainless be welded with an oxy-acetylene torch?

Plain ol Bill
12-20-2010, 08:07 PM
No you can't weld it that way.

Hogridnfool
12-20-2010, 08:42 PM
Check this out - http://www.hobartwelders.com/weldtalk/archive/index.php/t-39593.html

JCHannum
12-20-2010, 08:47 PM
Yes, it is weldable with an O/A torch. Use the proper flux and TIG filler rod. If not near a welding supply, Tinman sells this flux for stainless. His products are excellent and reasonably priced.

https://www.tinmantech.com/html/stainless_steel_welding_suppli.php

lazlo
12-20-2010, 09:04 PM
Check this out - http://www.hobartwelders.com/weldtalk/archive/index.php/t-39593.html

He brushed the bead, which means he probably sugared (overheated) it, and it came out flat grey (not good!). That's why welding inspectors insist on seeing the weld before you brush it -- you must have the rainbow oxides which show that you didn't cook it.

It takes some practice. This is 10 gage 304 stainless with TIG:

http://i164.photobucket.com/albums/u15/rtgeorge_album/Welding/IMG_3981s.jpg

Lap joint, same material/thickness. Colors are a bit washed-out by the flash, but you get the idea:

http://i164.photobucket.com/albums/u15/rtgeorge_album/Welding/IMG_3977s.jpg

oldtiffie
12-20-2010, 09:14 PM
http://www.amweld.com.au/broardband/webVideoPt4.wmv

http://www.amweld.com.au/video_menu.htm

http://www.amweld.com.au/

http://i200.photobucket.com/albums/aa294/oldtiffie/Cobra_torch_Book/Cobra2.jpg

http://i200.photobucket.com/albums/aa294/oldtiffie/Cobra_torch_Book/Cobra1.jpg

TriHonu
12-20-2010, 10:42 PM
HERE (http://trihonu.home.comcast.net/OA_HB_18.pdf) is a copy of Chapter 18 from the Linde Oxy-Acetylene Handbook that was referenced in the linked thread.

HSS
12-20-2010, 11:42 PM
http://www.amweld.com.au/broardband/webVideoPt4.wmv

http://www.amweld.com.au/video_menu.htm

http://www.amweld.com.au/

http://i200.photobucket.com/albums/aa294/oldtiffie/Cobra_torch_Book/Cobra2.jpg

http://i200.photobucket.com/albums/aa294/oldtiffie/Cobra_torch_Book/Cobra1.jpg

I see you didn't get the heat shield in you kit either.

oldtiffie
12-21-2010, 04:16 AM
I asked about the heat shield but they didn't have any in stock and advised me to make one a save a few dollars - which I did.

They provide very good support here in OZ.

Its a good kit. I use mine instead of my standard O/A kit and it saved me buying a TIG set and so saved me floor space and another rental bottle (for TIG).

Black_Moons
12-21-2010, 06:52 AM
Nice kit, what are the trigger looking things on the handle for?

mike os
12-21-2010, 07:31 AM
does it need to be a weld or will brazing do? ( easier, less HAZ & just as strong)

HSS
12-21-2010, 03:09 PM
Nice kit, what are the trigger looking things on the handle for?

The trigger is the same function as the lever on a standard cutting torch. In oldtiffie's picture it is rigged for brazing and the trigger is not used. For cutting you attach one of the squiggly bits on the right hand side of the case in the picture, and then you use the trigger. I especially like the one with the training wheels. :D :D
Oldtiffie, what did you use to make your heatshield, what material and pattern?
Patrick

oldtiffie
12-21-2010, 08:46 PM
Originally Posted by Black_Moons
Nice kit, what are the trigger looking things on the handle for?


The trigger is the same function as the lever on a standard cutting torch. In oldtiffie's picture it is rigged for brazing and the trigger is not used. For cutting you attach one of the squiggly bits on the right hand side of the case in the picture, and then you use the trigger. I especially like the one with the training wheels. :D :D
Oldtiffie, what did you use to make your heatshield, what material and pattern?
Patrick

http://i200.photobucket.com/albums/aa294/oldtiffie/Cobra_torch_Book/Cobra_book6.jpg

For BM: HSS has explained it correctly. The pic (pages from the manual) showing the set-up should help.

For HSS (Patrick): I just use a bit of scrap sheet metal or tin-plate from a can - when it looked right and worked right it was right. ie just "top of the head" stuff. I just make them as required. I usually just use MIG/TIG welders gloves and forget about the shield.

Black_Moons
12-22-2010, 04:54 PM
Nifty setup with the dual tips for cutting. Thanks for the pics.

lazlo
12-22-2010, 04:57 PM
Nifty setup with the dual tips for cutting. Thanks for the pics.

The dual tips are oxygen and acetylene :)

HSS
12-22-2010, 06:25 PM
Lazlo, you are correct sir, however, the lower tip is oxygen and acetylene and the upper tip is oxygen only, but that is straining at a gnat as my dear ole mother would say.:D

Patrick

oldtiffie
12-22-2010, 07:39 PM
Well.

You are a breath of fresh air Patrick.

You are quite right as the cutting torch is very similar to the normal O/A cutting torch in that regard.

HSS
12-22-2010, 09:34 PM
Not only works as well as an o/a torch but will cut as fine as a plasma torch, and much finer than an o/a torch.