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#1 |
Account Suspended
Join Date: Jan 2006
Location: Fort Worth
Posts: 155
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Question for the welder guys:
After going through this:
http://67-72chevytrucks.com/vboard/s...d.php?t=240708 I've found that I need to modify the main air conditioner bracket so it will bolt up to my "stock port location" Merlin cylinder heads...because it's not EXACTLY in the stock location. ![]() SO...that brings me to my question. Can I weld mild steel to cast iron with my MIG to "fix" my AC bracket? If so, what do I need to do it? ![]() LOL.. ![]() Last edited by Ozona; 05-13-2007 at 08:36 PM. Reason: Making it clearer...I think |
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#2 |
Senior Member
![]() Join Date: Apr 2001
Location: Alexandria, MN
Posts: 1,462
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Re: Question for the welder guys:
Well, my immediate response would be no... well at least not with the mig... I used to to tell my former metal shop students that its always a bad idea to try to weld dissimilar metals, HOWEVER, i am not a welding guru, and they do make some pretty funky welding rod combos for arc welders. AND I would say your not the first guy to have that issue. Im am interested to know if some of the pros know the answer for sure... if anything else.. ttt
--Mike
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63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's |
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#3 |
"Taste It"
Join Date: Aug 2006
Location: Keizer, Oregon
Posts: 280
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Re: Question for the welder guys:
I'm not saying this will work but you should have a good chance of getting it to stick. I've always welded cast w/ Ni rod (nickel cadmium) prepare the joint, get a torch heat up the cast until it's cherry red (very important) not orange.
Tack your pcs on if it loses it's cherry while your doing that preheat it again to cherry, weld pcs on and postheat to cherry wrap in normal fiberglass insulation and let cool slowly. when it cools give it a rap w/a hammer if she sticks she'll stay. Brian
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71 Chevrolet short fleet Cheyenne air cab/tilt w buddy buckets pretty stock other wise. ![]() ![]() 2007 Silverado Crew with the MAX Pack and loaded 2007 CX-9 "Hopefully when I die.. my wife wont sell my stuff for what I said I paid for it" It's easier to ask forgiveness than it is to ask permission. ![]() |
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#4 |
Registered User
![]() Join Date: Mar 2004
Location: Boiling Springs, PA
Posts: 391
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Re: Question for the welder guys:
ttt - I'm curious as well.
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#5 | |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Question for the welder guys:
Quote:
Use a high nickle rod. Pre-heat the cast piece. Weld the part. Slowly cool the piece down. The instructor added that in production facilities that do this regularily they use an oven to heat it up and cool it down at specified rates. The only difference in what I HEARD (again I've never tried this process) is that the instructor said you can place the piece in sand to insulate it and let it cool slowly verses using insulation.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#6 | |
Son of a gun
Join Date: Jan 2007
Location: Hot Springs, Arkansas
Posts: 1,636
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Re: Question for the welder guys:
Quote:
I think you would be better off trying to locate another bracket that would work, or fab up another bracket out of all steel.
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Bill BEATERS ARE NEATER |
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#7 |
"Taste It"
Join Date: Aug 2006
Location: Keizer, Oregon
Posts: 280
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Re: Question for the welder guys:
I was just saying it might work, I'd try it on a scrap pc if it was me.
Brian
__________________
71 Chevrolet short fleet Cheyenne air cab/tilt w buddy buckets pretty stock other wise. ![]() ![]() 2007 Silverado Crew with the MAX Pack and loaded 2007 CX-9 "Hopefully when I die.. my wife wont sell my stuff for what I said I paid for it" It's easier to ask forgiveness than it is to ask permission. ![]() |
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#8 |
Son of a gun
Join Date: Jan 2007
Location: Hot Springs, Arkansas
Posts: 1,636
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Re: Question for the welder guys:
Hey Brian, i'm not flamin you
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Bill BEATERS ARE NEATER |
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