How To Swage/Flare Hard Copper In The Field – Decrease Hardness and Increase Ductility



When working with hard copper in the field, you must anneal it first to swage or flare it. What is annealing? Annealing is a heat treatment that changes the properties of the copper to decrease or reduce its hardness and increase its ductility (able to manipulate it without fracturing or damaging it). Why would you anneal copper in the field? If for example, you don’t have the correct fitting on hand or perhaps you want to avoid fittings all together to avoid potential leak points, save money on fittings and brazing materials. No matter the reason, it is a skill that techs should put into their back pocket and save for a future job if needed.

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