Rose's Metal

Rose's Metal

Specifications ( Property Data Sheet )

Rose's metal, Rose metal or Rose's alloy is a fusible alloy with a low melting point. The alloy does not contract on cooling.

Rose's Metal Discovery
Valentin Rose the Elder, the German pharmacist and chemist, was the first person to discover this fusible alloy. The metal was then named “Rose's Metal” after its discoverer. Valentin Rose the Elder was also the grandfather of Heinrich Rose, the re-discoverer of the chemical element Niobium (Nb).

Rose Metal As a Fusible Alloy
Rose metal can be very conveniently used as a fusible metal. Fusible alloy are metal alloys that have a low melting point. Metal work pieces are joined together by a solder. Alloys with low melting points are used in the process of soldering so that they can join the work pieces in use by melting. As they melt in a very low temperature, the work pieces remain unaffected. Metals with a melting point between 90°C to 450°C are typically used as a solder. Soldering is mainly used in electronics and plumbing. The Rose metal alloy has a very low melting point. The alloy melts in 100°C or 212°F. That is why it is very useful as a fusible alloy and is used as a solder.

Designation Alloy     Melting Point     Shape
                  Celsius    Fahrenheit
Rose's Metal          98°C   208 °F     Bar
Rose's Metal          98°C   208 °F     Block
Rose's Metal          98°C   208 °F     Granule
Rose's Metal          98°C   208 °F     Ingot
Rose's Metal          98°C   208 °F     Lump
Rose's Metal          98°C   208 °F     Metallurgy
Rose's Metal          98°C   208 °F     Rod
Rose's Metal          98°C   208 °F     Slab

Chemistry Data
Element   Symbol       Content (%)
Bismuth     Bi         50% - 55%
Lead        Pb         25% - 28
Tin         Sn         22% - 25%

Related Metals

Equivalent Name

Uses (Application)

Rose's metal has several common uses:
1) As a solder. It was used to secure cast iron railings and balusters in pockets in stone bases and steps.
2) As a heat transfer medium in heating baths.
3) As a malleable filling to prevent tubes and pipes from crimping when bent. Rose's metal is melted and poured into the tube. It then solidifies in place but remains malleable. This allows the tube or pipe to be bent and reworked without crimping. After the desired shape is achieved the Rose's metal is remelted and removed, leaving the pipe or tube in its modified shape.

Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Store away from strong oxidizing agents, halogens, interhalogens.