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Tool Talk Discussion Forum

Is ther Ni-Cad welding wire?

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Amateur Welder

10-14-2003 07:12:47

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I've got some light cast iron repairs to do (or at least attempt) and only have a wire-feed mig welder (with argon-CO2 gas) using 0.023 wire. Is Ni-Cad (which I think is the most common rod for cast repair) wire available? And if it is, does it send a guy to the poorhouse for a small roll? Any suggestions or advice is appreciated.

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Chris Brown

10-15-2003 14:09:25

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Re: Is ther Ni-Cad welding wire? in reply to Amateur Welder , 10-14-2003 07:12:47

check out the link. it is supposed to be the best thing since sliced bread.I dont know

muggy site link

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george md

10-14-2003 08:35:28

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Re: Is ther Ni-Cad welding wire? in reply to Amateur Welder , 10-14-2003 07:12:47

amature welder,

When welding cast iron , the arc welder

is best when left on the shelf. Drag out the

acetylene torch and get some cast iron welding

rod and a can of flux , the rod is cast iron in

stick form and is the same material that you are

trying to repair .

Send me an email and I explain the process .

george

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Paul Janke

10-14-2003 19:27:54

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Re: Re: Is ther Ni-Cad welding wire? in reply to george md, 10-14-2003 08:35:28

If it isn't too tough, it would be nice if you could put the "how to" information here. I have some of that to do, and I'm sure there are lots of others who do as well. I'd even be glad to get a less than complete explanation if the whole thing is too much to put here. It would probably make a good article for this site. Thank you.

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george md

10-15-2003 22:56:20

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Re: Re: Re: Is ther Ni-Cad welding wire? in reply to Paul Janke, 10-14-2003 19:27:54

Paul and group, I'm not a writer but here goes. The rods are mostly square but some brands are round , they are cast iron in stick form . Welding with torch is like any other weld , needs to be clean and veed near completely thru ,leave enough to locate pieces. Preheat with large reasonably soft flame to 800 to 1000 deg F ( dull red glow ). heat rod to get flux to stick and also to bring it near to temp. Add small amount of flux to area to be welded , as surface 'wets' add filler rod and flow together as you work along weld. Puddle will get what looks like a scum on it,use enough flux to control it. Manufacturer says not more than 1/4 inch thickness to a pass .Maintain preheat while welding and heat evenly after you finish welding to help relieve stress. cover with insulating material ( asbestos blanket or similiar material) so that it will cool slowly.
For large castings build (stack) fire bricks around to form an oven and use large propane torch (weed burner or the like) to preheat , and it is best to preheat well and use small torch to weld.
Large casting in brick and covered well should take 10 to 12 hours to cool. When weld is ground or machined it will look like the original material because it is .
I have some pictures of a vice that I repaired , but don't have a clue how to put them up here , can email them.

george

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Kennyp

10-14-2003 09:10:49

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Re: Re: Is ther Ni-Cad welding wire? in reply to george md, 10-14-2003 08:35:28

Of course you are right, George. But he does not have a O/A setup. We all know that there is a "right" way to do things, like heat it in an oven etc, but sometimes we have to just "make do" I'm sorry, this sounds a little harsh..don't intend it to be...Thanks for your input. Kenny

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george md

10-14-2003 09:59:51

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Re: Re: Re: Is ther Ni-Cad welding wire? in reply to Kennyp, 10-14-2003 09:10:49

kenny, When he said a mig was all he had , I may have
made a false assumption that he didn't have a stickwelder.
he didn't say that he didn't have a torch .

george

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RobertTX

10-14-2003 08:16:52

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Re: Is ther Ni-Cad welding wire? in reply to Amateur Welder , 10-14-2003 07:12:47

Steve with U.S. Alloys used to post on this site and recommended their wire for cast iron to me once. It is available.

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r_d97

10-14-2003 17:35:24

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Re: Re: Is ther Ni-Cad welding wire? in reply to RobertTX, 10-14-2003 08:16:52

I called about that wire. I even got a quote. It only came in 0.035" on a 5lb roll for ~$35.00/lb. Recommended to use CO2/argon gas. I don't need to weld cast iron enough to justify cost. But I do have oxy/Acet torch. I need to get some of that cast iron rod George always talks about.

Edward

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george md

10-14-2003 19:16:40

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Re: Re: Re: Is ther Ni-Cad welding wire? in reply to r_d97, 10-14-2003 17:35:24

Edward ,

Next time your down here or I get up there

I'll make sure you have some rod and flux .

george

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Would 309?

10-14-2003 08:09:16

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Re: Is ther Ni-Cad welding wire? in reply to Amateur Welder , 10-14-2003 07:12:47

I've wondered on this too. How close does stainless 309 come? It has a prtty high nickle content. T-bone???

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old Joe (weld tech)

10-15-2003 14:54:57

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Re: Re: Is ther Ni-Cad welding wire? in reply to Would 309?, 10-14-2003 08:09:16

T-bone,

309 or any stainless steel is a bad idea on cast
iron and will crack because it is only 12% nickel.

You need at least 50% nickel to kill the carbon
effect the cast iron adds to the chrome and iron
in stainless.Carbon does not harden nickel thats
why nickel electrodes and wire works.The key is
lots of pre-heat and thats why I agree with George
that oxy-acetylene and flux works the best,the rod
used is a cast iron chemistry so it will shrink the same as the cast iron and not crack.

Pre-heat to 800F and slow cool.

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Slowpoke

10-15-2003 23:48:28

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Re: Re: Re: Is ther Ni-Cad welding wire? in reply to old Joe (weld tech), 10-15-2003 14:54:57

Can the item be coverd with sand to keep the heat in for several hours?

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Thanks

10-15-2003 21:49:07

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Re: Re: Re: Is ther Ni-Cad welding wire? in reply to old Joe (weld tech), 10-15-2003 14:54:57

Thanks

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