i am attempting to build a solar water heater..closed loop system..cutting a opening in a stripped down 40 gal. water heater..going to put a 50 foot loop of 1/2copper inside..where the copper enters and exits i need to weld or braze.. i am a newbie..i have a mig MM185,tig diversion 165 and oxy/act..
question is.. what is the best procedure to weld/braze this copper steel union?
thanks in advance for any advice..
tom
http://tomblackart.com/
Results 1 to 10 of 19
Thread: copper to steel
-
11-04-2009, 01:45 PM #1
Member
- Join Date
- Sep 2009
- Location
- Hereford, AZ.
- Posts
- 31
copper to steel
-
11-04-2009, 01:51 PM #2
Senior Member
- Join Date
- Sep 2005
- Location
- Salem ,Ohio
- Posts
- 3,657
I do copper to steel on my candle holders and i use silver solder. I would make a bung/sleeve from steel so it would a little thicker than the tank wall and mig weld it then silver solder the copper to the sleeve...Bob
Bob Wright, Grandson of Tee Nee Boat Trailer Founder
Metal Master Fab Salem, Oh 44460
Birthplace of the Silver & Deming Drill
1999 MM185 w/185 Spoolgun,1986 Thunderbolt AC/DC
-
11-04-2009, 02:14 PM #3
Member
- Join Date
- Sep 2009
- Location
- Hereford, AZ.
- Posts
- 31
not sure how to make a bung/sleeve..and what heat source do you use for your silver solder?
Originally Posted by aametalmaster
thanks bob
-
11-04-2009, 02:21 PM #4
Senior Member
- Join Date
- Jul 2006
- Posts
- 1,508
Have you thought about going to your local hydraulic shop and ask for a compression bulkhead fitting?
Caution!
These are "my" views based only on “my” experiences in “my” little bitty world.
-
11-04-2009, 02:36 PM #5
Member
- Join Date
- Sep 2009
- Location
- Hereford, AZ.
- Posts
- 31
i just assumed there was a way to join copper to steel with the tools i had. Originally Posted by Sonora Iron
thanks
-
11-04-2009, 02:44 PM #6
Senior Member
- Join Date
- Dec 2006
- Posts
- 612
How about welding a pipe coupler through the tank & adapt flair or compression fittings to the coupler?
I'm wondering how dissimilar metals will react (electrolysis).
-
11-04-2009, 03:03 PM #7
Member
- Join Date
- Sep 2009
- Location
- Hereford, AZ.
- Posts
- 31
it appears compression fittings may be the way to go Originally Posted by pro70z28
thanks
tom
-
11-04-2009, 03:56 PM #8
Senior Member
- Join Date
- Nov 2006
- Location
- Lake of the Ozarks MO
- Posts
- 3,446
Originally Posted by t-terrible
Originally Posted by aametalmaster
Just make a thing that looks like a thick washer. Mig weld the outer part to the tank. Using your O/A torch you silver solder the copper tube to the inside hole of the bung/washer thingie Originally Posted by t-terrible
All with the stuff you got. You could even use your tig to do it all as well
The thicker bung gives the solder more surface to hold on to and less chance of failing in the future. You could also braze it.
Now that we have helped you... you are obligated to post pics of this project as it progresses.Miller Dynasty 700...OH YEA BABY!!
MM 350P...PULSE SPRAYIN' MONSTER
Miller Dynasty 200 DX "Blue Lightning"
Miller Bobcat 225 NT
Miller 30-A Spoolgun
Miller WC-115-A
Miller Spectrum 300
Miller Spoolmate 200
Miller 225 Thunderbolt
SPEEDGLAS 9100XX
-
11-04-2009, 04:05 PM #9
Senior Member
- Join Date
- Jul 2008
- Location
- Delhi, Ontario:
- Posts
- 1,950
Bung-Thingie !
FK; Now that's Funny,
Bung- Thingie, way too Technical for Me !
Good One , Ha, Ha.
............. Norm
Sunrise Outside My Shop In Delhi, Ontario
- Weldcraft WP26FV Tig Torch setup.
- Arcair- K 4000 CAC.
- LN-25 Wire Feeder
- Lincoln Ranger 8- Engine Drive- CC\CV:
- Miller Econo Twin AC/DC High Freq.
- Lincoln Power Mig 180C
- Spoolgun.
- Horizontal Steel Band Saw
- DeWalt Chop Saw .
- DeWalt Compressor - 13cfm, @ 100 psi.
www.normsmobilewelding.blogspot.com
-
11-04-2009, 04:18 PM #10
Senior Member
- Join Date
- Dec 2006
- Posts
- 612
What's the part number for the bung-thingie?
Reply With Quote
