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Welding Shop

Welding rod

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Old 11-01-2007, 08:37:11 PM
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Chris J Chris J is offline
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Default Welding rod

Is their a rod that works on cast iron for arc welding? If so what is the rod number. Im getting really good at arc, im okay at acetaline welding, then i would have to use brazing rod, what would be better, brazing or arc? Thanks Chris
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Old 11-01-2007, 09:18:45 PM
Rick McKay Rick McKay is offline
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Default Re: Welding rod

Hi Chris!

There are many rods out there for arc welding cast iron. Generically they are referred to as "nickel rod". There are many different alloys of nickel rod for various types of cast. Some cast welds great, other cast doesn't weld worth a sh$#! A good method that increases your success rate at welding cast is to preheat the pieces to 400 degrees F, then weld, peen to stress relieve(I use a needle scaler), then cool very slowly (I bury my parts in ashes overnight).

Some nickel rod is quite expensive, but right off of the top of my head I don't remember any specific rod no's or pricing. I think the cheapes is up around $5 per lb. Maybe some of the other guys out there could recommend the best rod for engine cast.

Good Luck, and keep up the good work!!

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Old 11-01-2007, 09:53:00 PM
Gailey Henderson Gailey Henderson is offline
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Default Re: Welding rod

I have good luck with 3/32 7018 rod and only running 2 in. at a time and letting it to cool to touch
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Old 11-01-2007, 10:09:11 PM
LCJudge LCJudge is offline
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Default Re: Welding rod

The best rod I've found is made by Precision Alloy Co. of Scottstown, OH. The rod is Palco 808. Expensive, but good.
Tommy Turner
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Old 11-02-2007, 08:45:30 AM
K D Redd K D Redd is offline
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Default Re: Welding rod

You only need a nickle rod if you need to machine the part after welding. The nickle rod limits the "chill" effect when welding cast iron. The chill is when cast iron cools quickly developing White,I think, Cast iron which is VERY hard.

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Old 11-02-2007, 08:22:09 PM
John Tozzi John Tozzi is offline
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Default Re: Welding rod

Nickle rod, either NI55, or NI99. Use pre heat, post heat, and plenty or praying.
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Old 07-18-2008, 10:01:43 PM
ramsay ramsay is offline
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Talking Re: Welding rod

Hi all: I have used "Nickel Arc 99" in the past and have had good results with it.. The coating was conductive though so you have to be careful .. I welded some new teeth on a cast bevel gear and machined them to size and still use the drill press that the gear is used on...Mike
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Old 08-17-2008, 10:22:53 AM
Wayne Timms Wayne Timms is offline
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Default Re: Welding rod

Hi Chris,

You mention that you are okay at brazing with cast iron, I presume you mean a bronze stick. If this is the case, might I suggest you get a hold of some cast iron sticks and flux, and give cast iron welding a go. Bronzing cast iron is far harder than using cast iron sticks.

The cast iron sticks are simply cast iron, high in silca content. I have been using this method for over 20 years, and find the results far superior to anything else. Preheating the item is critical for this type of welding.

Bottom line is that you melt cast iron back into cast iron. It can be machined, drilled, tapped or whatever.

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