Silver-flo™ products are mainly used for soldering the following materials:
Steel (unalloyed and low-alloy steel) and stainless steel *.
Copper and copper alloys, including brass, bronze, nickel silver and aluminum bronze
Carbide and diamond segments.
* Note: For soldered connections on stainless steels that in use are exposed to moisture or an aggressive atmosphere, precautions have to be made to prevent interfacial / crevice corrosion.
Sil-fos™ braze alloys are recommended for flux-free soldering of copper to copper. If you are going to solder copper alloys, such as brass, bronze, nickel silver and aluminum bronze a compatible flux must be used. Sil-fos™ has the best ductility of the phosphorus-containing silver-copper solders. Sil-fos™ 6 has the best flow properties, but shows a lower ductility. Sil-fos™ 5 offers the best combination
between good flow properties and high ductility.
Copper-flo™ brazing alloys are recommended for the flux-free brazing of copper. They have a lower ductility than the silver-containing phosphorus solders.
The Tenacity™ flux range is specially designed for soldering with long heating cycles, for solder alloys with a low silver content and for copper based solders:
Tenacity™ boron modified flux
Tenacity™ flux pastes for hard and high temperature soldering
Copper-based solders are usually used for flux-free furnace soldering.
The JM Bronze™ solders are mainly used for brazing steel and carbide. The alloying of manganese and nickel or cobalt improves wetting and thereby the bond with the carbide.
These copper-zinc alloys are used for soldering bronze. They are also typically used for soldering tubular steel frames for cars, motorcycles, bicycles, furniture and to bond carbides to steel.
Nickel-based solders offer good corrosion resistance and are characterised by high temperature resistance. These solders are therefore commonly used in aerospace and the nuclear and automobile industries. Nickel based solders have a great number of different alloy compositions that exhibit different melting ranges, solder flow, solder and bonding properties. They are mainly used for furnace soldering in a vacuum or under a protective gas.
Johnson Matthey supplies a range of gold-containing carbide and high temperature solders. The products are made with the least possible impurities in order to meet the requirements of the aerospace and electronics industries.
Orobraze™ alloys are very resistant to oxidation and corrosion. In addition, high strengths at inceased operating temperatures are achieved.
The palladium-containing solders from Johnson Matthey are produced with the least possible impurities, such that they meet the requirements for use in a vacuum. Due to their extremely high corrosion resistance they are also used in the chemical industry.
Miscellaneous Precious Metal Brazing Filler Metals
In addition to the standard alloys Pallabraze™ and Orobraze™ Johnson Matthey is now able to supply most gold and palladium-containing alloys that are available on the market. In this section you can find a selection.
Johnson Matthey supplies a range of silver and copper alloys, which are used as binders and infiltrates. They play an important role in the production of special tools such as drills and drill heads
Electrical contact materials can be supplied in various customer-specific forms, including buttons, patches, wires, contact strips or rivets. Different materials are available:
Copper alloys and tungsten-copper alloys are used, for example for resistance welding and other applications, in which their high conductivity and high strength are required:
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