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Author Topic: what type of solder  (Read 374 times)

Geoff

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what type of solder
« on: September 03, 2018, 02:08:05 PM »

I'm looking for a solder that will withstand long term exposure to 230 degrees centigrade.


Is there anything that would melt at about 330 C or am I just into the realms of silver solder?




Cheers


Geoff
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john44

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Re: what type of solder
« Reply #1 on: September 03, 2018, 02:48:25 PM »

Hi Geoff, have a look at Bernzomatic lead free solder 430 deg from Screwfix.


John
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Perkasaman2

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Re: what type of solder
« Reply #2 on: September 03, 2018, 04:58:02 PM »

I would definitely use silver solder for this joint if possible. The higher the silver content percentage in the solder the easier it is to use.
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Geoff

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Re: what type of solder
« Reply #3 on: September 03, 2018, 05:30:38 PM »

Thank you for the feedback. I checked on the screwfix solder and apparently the melting point is 430 F and not Centigrade

Okay, if I silver solder what is best and what flux should I use? The joint will be very small a 4mm brass tube into a small block of brass.

Cheers

Geoff
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tonyH

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Re: what type of solder
« Reply #4 on: September 03, 2018, 06:34:25 PM »

Cupalloy do a couple of low silver (1.5%) silver solders with a 305 degree melting point, fluxed or solid to suit the work. I've used it on low pressure parts of a steam setup and it flows quite nicely. :-))
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Treble

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Re: what type of solder
« Reply #5 on: September 04, 2018, 12:59:11 PM »

CupSol also do a solder that melts at 305C . Can supply you a short length if required . Trevor.
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Treble

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Re: what type of solder
« Reply #6 on: September 04, 2018, 02:10:41 PM »

DURR ! ME BRANE URRTS ! Sorry about that .  Really do need to come off the happy pills . What I meant to say was Comsol solder , which from memory melts around 300C and is/was  a Johnson Matthey product . Offer of a short length still applies . Trevor  .
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john44

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Re: what type of solder
« Reply #7 on: September 04, 2018, 02:39:59 PM »

Farnell also do a 301deg C multicore solder. Product no DHMP 18.


John
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john mantova

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Re: what type of solder
« Reply #8 on: September 04, 2018, 11:42:09 PM »

Your demand for this solder indicates a high temp piece of equipment. If the temp was to creep a bit higher under pressure could be a problem. For safety sake I would use silver solder and a flux of Borax paste. Mind you don't overheat the brass as you could burn out the zinc leaving the brass brittle/weak. While were are talking solder does anyone know of a LOW TEMP alloy solder. I repaired a crankcase with some years ago. Can't
recall the name just now but I believe there are more modern ones now.Lower temp and easy flowing but can't find it. Anyone know?


















































































































































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