Electronics Forum | Wed Mar 21 13:16:11 EDT 2012 | grahamcooper22
What solder alloy are you using at the moment which is coming to the end of its limits ? Normally in general for safe operation of an alloy we don't like to recommend any operation temp that is higher then two thirds of the solders melt point, but th
Electronics Forum | Wed Mar 21 11:46:46 EDT 2012 | torch
thanks for the info :)
Electronics Forum | Wed Mar 21 11:42:54 EDT 2012 | davef
Downhole solder suggestions, in order of preference are: * Kester Sn96.3Ag3.7. Most vendors do not stock straight tin-silver alloys, whose wallet is that fat? * SAC305 can usually be used in place of one of the copper-free tin-silver alloys in downho
Electronics Forum | Wed Mar 21 10:37:02 EDT 2012 | torch
we are currently developing a 180 degs downhole tool and are right at the limits of our current solder paste, the tool has mostly surface mount parts and some fine pitch ic's. i was wondering if anyone had any recomendations for a suitable solder pas
Electronics Forum | Wed Mar 21 13:47:16 EDT 2012 | jax
To have an Operating Temp (Tool Classification) within your range, you might want to try. PB85 (Pb85/Sb10/Sn5) SMT is normally processed using Vapor Phase but can also be achieved with Nitrogen assisted Convection Reflow depending on size and compl
Electronics Forum | Tue Feb 08 22:04:34 EST 2005 | davef
Tough to say. Can you accept the loss of strength of your solder connection if upto 2% of the solder is affected? * Lead and bismuth alloys can form a eutectic composition of Bi52Pb32Sn16 in the grain boundaries. * Melting point of the eutectic all
Electronics Forum | Wed Apr 14 20:24:48 EDT 2004 | Ken
What do you mean the solder must "survive" 260C? What is your target temperature? Is it dictated by a component, the substrate or the solder alloy? Do you require a eutectic alloy? If not, the selection of alloys grows. (these are from memory...n
Electronics Forum | Wed Oct 01 10:01:15 EDT 2008 | davef
We've never used the 99*C lead-free solder you mention. We have used a leaded solder that can form a 93*C eutectic solder. So, we had to be sure the service temperature [of the solder connections] as below 80*C.
Electronics Forum | Tue Oct 07 13:25:58 EDT 2008 | patrickbruneel
The 99C is the part number used by manufacturers for the Sn 99.3% Cu 0.7% Alloy.
Electronics Forum | Thu Apr 15 14:36:06 EDT 2004 | Ted
I need solder that has a solidus temp. of approximately 260C so that when sent through a second reflow of 260C the solder doesn�t become liquidus. However, I need the max reflow to be less that 300C because of the substrate.
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