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Fusible alloys, solders

Low melting alloys are defined as alloys with a melting point well below that of tin. Most of these alloys are based on the metals bismuth and indium, in several cases also on gallium. Some of the standard alloys are listed below. Haines & Maassen Metallhandelsgesellschaft has many of these alloys on stock and supplies them at low prices, even in small quantities. Of course we supply only premium alloys to agreed specifications. Many other alloys (according to customers’ requirements) can also be delivered in small quantities at short notice.

Indium based fusible alloys

  • Eutectic indium-bismuth solder

    The system In - Bi provides three eutectic compositions with different melting temperatures. The most common type

    66.7In   33.3Bi   Melting temperature: ~ 72°C

    is often used as an alternative for wood's metal, but without lead and cadmium. This alloy can also be supplied in the form of 1.5 mm wire.

  • Field's metal

    The traditional Field's metal is a eutectic alloy from indium, bismuth and tin.

    51In   32.5Bi  16.5Sn   Melting temperature: ~ 62°C

    This alloy is a cost-effective alternative to In-Bi solder and is also often used as an alternative for wood's metal.

Bismuth based alloys

  • Wood's metal

    Woods metal is one of the oldest low melting alloys used. Its composition is close to the eutectic point of the bismuth-lead-cadmium-tin system and has a melting range around 70 °C and is relatively inexpensive.

    50Bi   25Pb  12.5Cd   12.5Sn   Melting range: ~ 70-74°C

    It is still widely used but is increasingly being replaced by less critical alternatives. We do not sell this alloy to private individuals!

  • Roses Metall

    The composition is similar to Wood's metal, but without cadmium.

    50Bi   25Pb  25Sn   Melting interval: ~ 93-96°C

  • Bismuth-tin eutectic alloy

    This composition has a higher melting temperature than the above alloys.

    58Bi   42Sn   Melting temperature: ~ 138°C

    It produces delicate casts which are quite stable even in filigree forms and usually have a metallic silvery finish.

  • Bismuth-tin-silver alloy

    Similar properties as Bi - Sn eutectitc alloy but more malleable.

    57Bi   42Sn   1Ag   Melting temperature: ~ 138°C

  • Bismut-indium eutectic alloy

    Another eutectic composition of the Bi-In system. Cost effective as it has a lower indium content.

    67Bi   33In   Melting temperature: ~ 109°C

Gallium based alloys

  • Gallium

    Not an alloy but should also be considered due to its low melting point.

    100Ga   Melting point: 29.8 °C

    Further information on our gallium information page.

  • Gallium-indium alloy

    We offer a close to eutectic gallium-indium alloy with the following composition:

    76Ga   24In   Melting temperature: ~ 16-17°C

    This alloy tends to have a strong tendency towards oxidation.

  • Gallium-indium-tin alloy

    Lowest melting temperature of all our standard alloys.

    62Ga  22In  16Sn   Melting interval: ca. 11-13°C