This is a Bismuth based eutectic alloy which finds uses in shielding during medical radiation treatments and is also a cadmium-free solution for radiation therapy. This material also has a rapid growth of up to .0061 after casting. It has also been used as anchoring material and for designing fusible links.

  • Cakes
  • 1/8", 1/32" Dia. Solid Wire
  • Irregular Shot
  • Pigs
Belmont Product Code2531
Nominal Composition:
  • 52.5% Bi
  • 32% Pb
  • 15.5% Sn
Technical Info:
  • Melting Point - Solidus 203 F, 95 C
  • Melting Point - Liquidus 203 F, 95 C
  • Short-Term Tensile Strength lbs/ 6100
  • Yield Temperature 203
  • Weight lbs/ 0.35
  • Brinnell Hardness No. (500 kg) 9
  • Growth/Shrinkage - Time after Casting: after 2 mi.: -0.0002
  • after 1 hour: 0.0055
  • after 24 hrs: 0.0057
  • after 500 hrs: 0.0061

Related products

  • This is a Tin based non-eutectic low melting alloy . The principle uses of this alloy are in applications similar to investment casting in which it substitutes for the so called ” lost wax ” pattern dies. It’s other applications also include proof casting and sealing or soldering in low-temperature applications.

    • Cakes
    • Slug
    Belmont Product Code2405
    Nominal Composition:
    • 40% Bi
    • 60% Sn
    Technical Info:
    • Melting Point - Solidus 281 F, 138 C
    • Melting Point - Liquidus 338 F, 170 C
    • Short-Term Tensile Strength lbs/ 8000
    • Yield Temperature 302
    • Weight lbs/ 0.296
    • Brinnell Hardness No. (500 kg) 22
    • Growth/Shrinkage - Time after Casting: after 2 mi.: -0.0001
    • after 1 hour: -0.0001
    • after 24 hrs: -0.0001
    • after 500 hrs: -0.0001
  • This is a Bismuth based Eutectic low melting alloy used very often to bend tubes and rolled or extruded shapes. This alloy which is normally used for tubes up to 2-1/2″ Diameter allows them to be bent or formed to the desired shape without any kinks. Without using this material the tubes or shapes may kink or bend irregularly. It can also be used for work-holding, fusible safety devices and low temperature soldering.

    • Cakes
    • Capping Bars
    • 1/8" & Down Shot
    • .05", 1/8", 3/32" Dia Solid Wire
    • 1/8" x 18" Cast Strips
    Belmont Product Code2505
    Nominal Composition:
    • 50% Bi
    • 10% Cd
    • 26.7% Pb
    • 13.3% Sn
    Technical Info:
    • Melting Point - Solidus 158 F, 70 C
    • Melting Point - Liquidus 158 F, 70 C
    • Short-Term Tensile Strength lbs/ 5990
    • Yield Temperature 158
    • Weight lbs/ 0.339
    • Brinnell Hardness No. (500 kg) 9.2
    • Growth/Shrinkage - Time after Casting: after 2 mi.: 0.0025
    • after 1 hour: 0.0051
    • after 24 hrs: 0.0051
    • after 500 hrs: 0.0057
  • This is a Bismuth based Eutectic low melting alloy used for tooling and production aids. It provides you with easily castable material that is ready for use as soon as it freezes. This alloy can be recovered easily and recycled into new uses a number of times. It is mainly used in the optical industry for lens blocking when grinding glass, plastic lenses and optical components. It’s low melting point allows it not to distort the glass or plastic which it supports. Also can be used for proof casting as well.

    • 2 lb Cake Even Weight
    Belmont Product Code2451
    Nominal Composition:
    • 44.7% Bi
    • 5.3% Cd
    • 22.6% Pb
    • 19.1% In
    • 8.3% Sn
    Technical Info:
    • Melting Point - Solidus 117 F, 47 C
    • Melting Point - Liquidus 117 F, 47 C
    • Short-Term Tensile Strength lbs/ 5400
    • Yield Temperature 117
    • Weight lbs/ 0.32
    • Brinnell Hardness No. (500 kg) 12
    • Growth/Shrinkage - Time after Casting: after 2 mi.: 0.0005
    • after 1 hour: -0.0001
    • after 24 hrs: -0.0002
    • after 500 hrs: -0.0002


Low-Melting Alloys Containing Indium: Characteristics and Applications

Often when thinking about metal alloys, we consider the strength and durability of the metal to withstand a range of loads, stresses and extreme temperatures. Yet there are a range of manufacturing applications where an alloy needs to have a low melting characteristic. A low-melting alloy, also called fusible alloy, can take a liquefied or…

Applications Using Low Melting Alloys

Low melting alloys are considered fusible alloys because they melt at temperatures below 300 degrees are often combined with other metals in order to increase certain properties. For example, Bismuth is often combined with tin and/or silver to create lead-free solders that are non-toxic. Low Melting Alloy Applications and Uses Low melting alloys can be…

Characteristics of Low Melting Alloys

Manufacturers around the globe rely on quality materials to create a range of parts, equipment and products for businesses and consumers. During the assembly process, different materials may need to be joined together for a tight seal, cast in a mold to a designed form, or bent into a new direction without collapsing. Low melting…

Liquid metal’s low melting point

Fusible alloys’ low melting point makes them useful in a wide variety of applications The melting point of aluminum is 1,220 degrees Fahrenheit. Carbon steel melts somewhere between 2,600 and 2,800 degrees Fahrenheit, and the temperature needs to rise all the way up to 6,150 degrees Fahrenheit to melt tungsten. Specialized furnaces are needed to…

The Basics of Bismuth

This white element is an essential part of many alloys Purple-Silver, crystalline Bismuth has been in use since the early days of alloying, although during those times, it was often mistaken for Lead. It’s the most naturally diamagnetic element, which means it repels both north and south, and it has one of the lowest values…