Silver solder question

[David KParticipant @davidk77137]

[David KParticipant @davidk77137]

I need to make some unions like the ones pictured below.

They are for 1/8 copper pipe and I would like a neat join with

minimal solder showing.

I was thinking whether to use solder paste in a syringe rather than the

rod which I am used too .

[JasonBModerator @jasonb]

If you cover the areas where you don't want the solder to flow with a resist such as Tippex then you can solder with rod or paste.

[Keith HaleParticipant @keithhale68713]

Hi David,

Make a solder ring to fit inside the fitting. Probably using 1.0mm wire

Flux the joint.

Heat the joint line, the alloy will melt and flow towards the heat.

If using paste, put it inside the fitting and heat as above.

If using paste, you will probably need twice the amount you think!

A ring is the cheapest option.

Regards

Keith

[David KParticipant @davidk77137]

Correction fluid Tippex ? do you use this to stop the flux spreading around the joint.

[JasonBModerator @jasonb]

Yes and Yes. Needs to be solvent based tippex.

[David KParticipant @davidk77137]

Thanks Jason .

Cup Alloys , had an interesting read on your site and could do with some silver solder.

Would the low temp 455 be ok for this job , thanks

[Keith HaleParticipant @keithhale68713]

Hi David,

455 would be fine. It produces small neat joints.

Regards

Keith

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