Electronics Forum: paste bismuth (Page 1 of 4)

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Tue Nov 06 22:37:35 EST 2012 | davef

Ryan ... "As for bismuth-based lead-free alloys, a lower melting temperature than that of tin-lead is offered together with a cost similar to that of tin [in the area of $3/lb]. Unfortunately, bismuth in soldering alloys tends to create embrittlemen

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Thu Nov 15 03:07:35 EST 2012 | nikyta

Thanks for your reply. As already said by Anvil1021, is not a good idea to mix Lead and Bismuth! Stay away from Bismuth if you have even the slightest traces of Lead on yours PCB, stencil, squeegee, spatula, blade, cleaning paper or cleaning cloths,

paste Sn42/Bi58 and Lead Finish

Electronics Forum | Fri Nov 02 09:09:56 EDT 2012 | davef

Sure you can use it it with leaded HASL. Recognize that ... * Your Sn42/Bi58 will no linger be Sn42/Bi58 * Your leaded HASL will no longer be the same leaded HASL that walked in the door to your plant * Lead from HASL coatings can diffuse through the

Lead Free Component on solder paste (lead)

Electronics Forum | Fri Jan 04 15:42:03 EST 2002 | nwyatt

There are several implications: - some lead free alloys do not form an acceptable solder joint when used with lead contaning paste. (ie. Bismuth) - if you use both lead free and lead containing components, you will have different solder joint compos

Lead Free Component on solder paste (lead)

Electronics Forum | Wed Nov 20 09:27:28 EST 2002 | davef

There's a fair number of issues with lead and bismuth solder alloys: * Lead and bismuth alloys can form a eutectic composition of Bi52Pb32Sn16 in the grain boundaries. Melting point of the eutectic alloy is 95�C [~96�C?]. * Fillet lifting of PTH du

solder paste ingredients and their effects

Electronics Forum | Fri Feb 09 02:30:50 EST 2007 | Muhammad Haris

What are Resins, Solvents, Activators, and Thickening Agents in Solder Paste and what are their helpful and harmful effects? AND What are the purposes/properties and effects of Sn(Tin), Pb(Lead), Ag(Silver), Bi(Bismuth), In(Indium), Cu(Copper), Ni(

low thermal emf solder & paste - SAC 405

Electronics Forum | Tue May 13 17:53:54 EDT 2014 | anvil1021

Hello Michel...this might be a bit of a battle finding the low thermal EMF material that you are looking for. The first one that comes to my mind is Bismuth Selenium Telluride, with either a nickel or cobalt doping agent. Silver went away from this

Bismuth containing Solder Paste

Electronics Forum | Tue Jan 06 18:06:05 EST 2009 | aj

Hi all, I am currently trialling a solder paste which contains Bismuth. It is leadfree and reflows at 138 degrees C. I would appreciate any pros/cons? aj...

Bismuth containing Solder Paste

Electronics Forum | Wed Jan 07 10:37:08 EST 2009 | evtimov

Hi, in the beggining of PB free process, there were a lot of solder pastes based on a Bismuth and some other materials, mainly because of their low melting temperature. The feedback shows problems in the mechanical strenght of the joints with the ti

Low temp Lead Solder Paste

Electronics Forum | Fri Nov 25 09:27:09 EST 2011 | fjtxra

Dear All, I´m looking for a low temp solder paste with Lead. I know that, with lead free, is common solder paste with bismuth for low temp in Pin in Paste line, but one customer aks me about low temp solder paste with lead. If anybody knows about and

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