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solder replacement adhesives
Johnson Matthey Silver-flo™ 67X Extra Easy Silversmithing Solder
Categories: Metal; Nonferrous Metal; Precious Metal; Silver Alloy; Solder/Braze Alloy

Material Notes: Silver-flo™ 67X, 67E, 67H, Silver-flo™ 74M, and Silver-flo™ 81En are cadmium free silver brazing filler metals designed for use on silver and silver alloys. They are used by silversmiths and referred to as ‘solders’. These filler metals are often simply described by using their traditional names ‘Easy’, ‘Extra Easy’ etc. These names describe the relative melting temperatures of the ‘solders’, ‘Extra Easy’ being the lowest and ‘Hard’ being the highest.

Each ‘solder’ has a minimum 66.7% of silver and hence can be used as a hallmarking grade ‘silver solder’ on sterling silver. Apart from the Silver-flo™ 81En these ‘solders’ generally have good melting ranges and are therefore relatively free flowing. They produce neat joints with small fillets and also provide a good color match with silver alloys. These characteristics make them ideal for joining silver alloys in jewelry or silversmithing applications.

Silver-flo™ 67E can also be used on pure or high silver content alloys to prevent dissolution of silver by the molten brazing alloy.

Here a ‘solder’ with a high melting point and with a low zinc content is required so that the enameling process neither re-melts the soldered joints nor causes the zinc in the ‘solder’ to volatilize.

Primarily used for joining sterling / standard silver and other high silver content alloys used in the silversmithing industry.

Information provided by Johnson Matthey Metal Joining

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Solder ReplacementRoHS 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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