Flux

[Speedy Builder5Participant @speedybuilder5]

I have used silver solders for many years and used a basic flux from various suppliers. When making joints with stainless steel I always use HT5 types of flux, but I am now tending to find that it is beneficial to use HT5 on any job where the heating may be prolonged. Typically this may be when using a smaller cartridge gas torch instead of the larger 'Bullfinch' propane torch.

I see that one of our suppliers charge an extra 50p for the 250 gram HT5 powder fluxes compared with the EF, so cost wise there is little difference.

Are there any disadvantages in using HT5 instead of the EF range ?

[Speedy Builder5Participant @speedybuilder5]

Silver solder flux types

[Brian HParticipant @brianh50089]

The only disadvantage that I know of is that the flux residues can be difficult to remove, especially after prolonged heating. Boiling in water with a little detergent will get rid of it as will leaving the items for a few days in a damp atmosphere.

Brian

[Thor 🇳🇴Participant @thor]

I too use the HT5 type flux for all my brazing, and as Brian says, the flux residues may take be a bit more difficult to remove and need a longer pickle time.

Thor

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