Flux

[Steve Beckwith]

I have read that kerosene can be a substitute for borax as a welding flux. Would mineral spirits work? Diesel fuel? Just curious. Thanks

 

[Travis_Wright]

I use wd40 on a billet prior to putting in the forge and go flux-less from there to forge weld. I really don't see an advantage to using borax because to me cranking up the temp. in the forge and a good cleaning prior will keep you from needing much, if any, flux.

I think there's quite a few different combinations that can be used but I've found what works for me.

 

[Steve Beckwith]

So borax will weld at a lower temperature than wd40?

 

[Travis_Wright]

I don't know that honestly. What I'm saying is that temp. and cleanliness seems to make flux less and less a contributing factor in forge welding for me .

 

[John mc c]

Ive never used borax only read about it and that was enough
I've only used kerosene and no nasty stuff to deal with
I have no idea about diesel or any other as kerosene works so well I stick with it

 

[Russ Andrews]

No flux needed. So long as the steel is clean, and the forge atmosphere is slightly fuel rich, and you have enough heat...the steel will want to weld.
I switched from kero 3-4 years ago and have had no problems welding. and I don't tack weld....
just bind the billet with steel fencing wire, and place in the forge (flat & level) and wait....