By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Silver soldering, I still don't get it.

All Topics | Latest Posts

Search for:  in Thread Title in  
Stub Mandrel16/07/2013 21:06:03
4315 forum posts
291 photos
1 articles

Hi Bill,

Because copper-phosphorus brazing alloy is bad news for boilers.

Look at CuP alloy's site, or Johnson Matthey's - they have loads of good advice and will point you at lower-silver content hard solders. In the UK for general purpose we used to use easy-flo but it got phased out because of its cadmium content and we now use slightly more expensive and slightly higher melting point alloys - silver-flo.


Bill Brehm17/07/2013 15:30:16
5 forum posts

I had to read a bit about boilers, and the problems caused by copper-phosohorus. I can see why you might not even want it anywhere in your shop. For my use, which is a static model, would it be a satisfactory alternative to Silver solder? I guess I'm asking the question: other than safety, why silver?

I need to do the second frame rail today, and considering how well putting the thin foils of solder between the mating surfaces worked, I'm thinking of just tinning one, or both piece first. I'm hoping there will not be a need for any additional solder.


JasonB17/07/2013 16:17:47
22750 forum posts
2653 photos
1 articles

I would avoid tinning one or both sides. Its fine to use with the low temperature"soft solders" but when you reheat silver solder the second time it needs more heat to get back to the liquid state.


Bill Brehm17/07/2013 21:59:51
5 forum posts

I just put on the thin foil like yesterday, no tinning. This one turned out much better.



All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Eccentric Engineering
Eccentric July 5 2018
Rapid RC
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest