Johnson Matthey A25™ 2.5% Silver-Lead Soldering Alloy

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Johnson Matthey A25™ 2.5% Silver-Lead Soldering Alloy
Categories:	Metal; Nonferrous Metal; Lead Alloy; Solder/Braze Alloy
Material Notes:	Johnson Matthey’s A25™ offers increased strength and creep resistance at elevated temperatures over conventional tin-lead solders. The silver addition improves wetting of A25™ onto copper and copper-based alloys and to a lesser extent on steels. Flow of the alloy is not as good as tin-lead alloys. The optimum joint gap for A25™ is 0.2mm. A25™ is specified where its increased strength and creep resistance at elevated temperature is an advantage. With the correct choice of flux this alloy will join copper and copper alloys, carbon steels and stainless steels. Information provided by Johnson Matthey Metal Joining
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Thermal Properties	Original Value	Comments

Melting Point	304 °C

Component Elements Properties	Original Value	Comments
Lead, Pb	97.5 %
Silver, Ag	2.5 %

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NJMMJ9702 / 186103

RoHS Compliant Adhesives for Solder Replacement
Master Bond offers RoHS compliant, electrically conductive systems to replace lead soldering. These epoxy and silicone adhesives offer low volume resistivity, low outgassing and high temperature resistance.

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