Cast Iron Weld repair.

[zeppelin builder]

I have done various cast iron weld repairs with them, last I did was a record vice that was chucked out from my workplace a long time back, the vice is still good and has not failed since.
The rods are about 1/4" thick, squarish. You revolve them in your fingers and stir them into the weld to get rid of what looks like shiney spots which are actually graphite in the cast.

I only knew the flux being called cast iron flux.

it is indeed

 

[zeppelin builder]

A mixture of borax and ammonium chloride is used as a flux when welding iron and steel. It lowers the melting point of the unwanted iron oxide (scale), allowing it to run off. Borax is also used mixed with water as a flux when soldering jewelry metals such as gold or silver, where it allows the molten solder to wet the metal and flow evenly into the joint. Borax is also a good flux for "pre-tinning" tungsten with zinc — making the tungsten soft-solderable.[19] Borax is often used as a flux for forge welding.

so sal ammoniac and borax mixture would work

 

[zeppelin builder]

Blimey that’s old. We don’t do that anymore

15 years old i reckon . SIF will do it deffo

 

[TechnicAl]

so sal ammoniac and borax mixture would work

Yes it should do

 

[zeppelin builder]

Yes it should do

blocks of sal ammoniac are available for cleaning tinning soldering bolts could crush it up and mix 50=50 with borax ànd experiment on a bit scrap

 

[TechnicAl]

blocks of sal ammoniac are available for cleaning tinning soldering bolts could crush it up and mix 50=50 with borax ànd experiment on a bit scrap

i dont know the proportions so 50/50 is probably best place to start.........be interesting when you find the best mix to know the cost and then compare against the SIF.......I think I can guess the rough answer

 

[nickk]

I've only ever used mma with pre heat, never succeeded cold, occasionally it won't take, otherwise successful ,load bearing parts aswell,so well done that man for a good cold weld.by the way always used nickel ferrite.