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
66.3In 33.7Bi 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.
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. This alloy can also be supplied in the form of 3 mm wire.
Indium-tin eutectic alloy
This classic solder alloy is less brittle than indium-bismuth alloys, but has a slightly higher melting point.
52In 48Sn Melting temperature: ~ 117 °C
We have wire, 1 mm in diameter, in stock. This alloy is also used for heat-conducting foils. Let us know what you need and we’ll see what we can supply.
Bismuth based alloys
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!
The composition is similar to Wood's metal, but without cadmium.
52Bi 32Pb 16Sn Melting temperature: ~95 °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.
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
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.
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.
Lowest melting temperature of all our standard alloys.
62Ga 22In 16Sn Melting temperature: ~ 11-13 °C