Furnace Brazing

i would like some input on some backyard techniques anyone has used for joining mild steel or cast steel/ductile iron to grey cast iron, such as a cylinder head or a block. i understand the basics of the process, i just want to know more about the alloys used, suitable materials, fluxes, furnace/forge construction, vacuum source etc.

 

Crosley engines were furnace-brazed, You might try looking into that.

 

yup, the original "cobra" engine used in first genreration Crosleys (short for copper-brazed-aluminum IIRC). die-cut sheet metal strata were sandwiched with copper layers then furnace brazed together. they had issues with corrosion due to galvanic action within the cooling system and went with an iron block later on