SILVER SOLDER

[RICHARD GREEN 2Participant @richardgreen2]

Has anyone used " Silverflo 452 ",

How did it compare to " Easyflo No.2 "

Has it any limitations ?

Richard,

[RICHARD GREEN 2Participant @richardgreen2]

[Keith HaleParticipant @keithhale68713]

Silverflo 452 is a 45% silver cadmium free alloy with 2% tin. It will produce strong joints but it behaves nothing like easiflo 2. It has a higher melting point and is not as fluid. Like anyone else who struggles with a cadmium free alloy fit a larger burner.
Keith

[Bob StevensonParticipant @bobstevenson13909]

The trouble I had(have) is that 452 seems to have a melting point dangerously close to the melting point of the brass. For small workpieces this can be really difficult as there is a real chance of destroying the edges of the piece by having to use too much heat.

[Keith HaleParticipant @keithhale68713]

The silver solder melts at 640 – 680 deg C. Most brasses melt about 850 deg C.

Bob, in your case you have too much heat. Fit a smaller burner.

It will probably have a more focussed flame with which you can control the heat better and not melt the edges of small components. That is why Sievert have the range of burners that they do.

For the same reason, people buy a range of spanners not an adjustable one.

One size does not fit all !

Keith

[RICHARD GREEN 2Participant @richardgreen2]

Had some Silverflo 452 delivered today,

just used 2 rods, absolutely lovely, just like Easyflo,

I used it on some heavy brass sections and some 15mm copper tube and fittings,

Used Easyflo flux, and plenty of heat, ( Oxy Propane ) , no problems at all.

Richard.

[Bruce EphgraveParticipant @bruceephgrave76327]

Hello,

Would like to know how to keep fillets neat.

Thanks,

Bruce.

[Keith HaleParticipant @keithhale68713]

Hello Bruce

Examine your joint design, heating technique and how and where the alloy is applied.

Remember to use the effect of capillary flow to create small, neat tidy joints.

I am reliably informed that a new book covering this aspect is being launched at the Midlands Exhibition on the CuP Alloys stand or why not just come and talk to us.

Regards

Keith

[CirclipParticipant @circlip]

Second plug Keith, how much is the book going to cost?

Regards Ian.

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