All MetalShaping

Go Back   All MetalShaping > General Metal Shaping Discussion > Welding Sheet Metal
  Today's Posts Posts for Last 7 Days Posts for Last 14 Days  

 
 
Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #14  
Old 12-04-2017, 08:50 PM
crystallographic crystallographic is offline
MetalShaper of the Month October '14 , April '16, July 2020, Jan 2023
 
Join Date: Dec 2010
Location: Western Sierra Nevadas, Badger Hill, CA
Posts: 4,388
Default

Quote:
Originally Posted by Jim Tomczyk View Post
Thanks Kent for the detailed explanation and reply (and Jerry /Mike /AllyBill for your inputs)
Answers the questions or should I say blanks I had in my head - especially as very much a " learner " & hadn't heard of dilution - appreciate this is more of a problem if welding new to old materials - does this still also apply though if the same material is used as filler? - assuming new to new and filler is an offcut of the new.

Not looking for a shortcut - as my personal goal with gas welding is as you say -just interested in the flexibility of the different processes and where they might crossover if at all.
Hi Jim,
I cannot think of a time when using the same/nearly-same filler as material being welded would lead to a cracking/failure problem, so am thinking dilution is not the problem, in these cases ...? - no matter the welding method.

For decades welders used parent metal strips to weld with (much before tig' arrival - Dec. 1942).
Distinct fillers came about during the 1930's, along with the growth in numbers of alloys of aluminum, 4130, stainless, magnesium...etc.

Incomplete fusion can be a problem, with any welding method, and tig is not above it all and seems also to have its share of cold-shut joints and insufficient filler deposition. (Note: NHRA requires drilled holes in welds to demonstrate depth of penetration on tig-welded roll bars/cages on those race cars.)

Personally, I think careful scrutiny of failed welds is a priority in establishing any/all aspects contributing to failures, even adding third and fourth sets of eyes/minds ....

(Caveat: Any number of competing opinions can and do arise as pertaining to welding questions/difficulties/methods/techniques/styles/preferences... etc etc, and so one clear choice/path/method/procedure may of its own volition, spontaneously diss i p a t e.)
__________________
Kent

http://www.tinmantech.com

"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
Reply With Quote
 

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 04:20 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.