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158°F Eutectic Fusible Alloy Bar – 3.75 lbs


Quantity Per Item Price
1-19 $41.67
20-24 $27.94
25-49 $19.68
50-149 $11.81
150+ $7.08
SKU: Ingotbo-05158-3.75lbIG Categories: , ,


Typical Properties:


#158 Alloy

Eutectic Alloy

Liquidus: 158F – 70C
Solidus: 158F – 70C

Yield Temperature: 158F
Weight: 0.339 lb/in3
Tensile strength: 5.99 ksi
Slow-load elongation: 200%
Brinell hardness: 9.2

Specific Heat
Liquid: 0.040 Btu/lb-F
Solid: 0.040 Btu/lb-F
Latent heat of fusion: 14Btu/lb
Coefficient of thermal expansion: 12
Electrical conductivity: 4.0% Cu

Fusible Alloys include a group of binary, ternary, quaternary, and quinary alloys containing Bismuth, lead, tin, cadmium and indium. The term fusible alloy refers to any of the more than 100 white-metal alloys that melt at relatively low temperatures.

Fusible alloys are materials that melt at less than 300F, well below the melting point of Tin-lead eutectic solders. The major component of fusible alloys is bismuth. Besides producing low melting point, bismuth also gives these materials the unique characteristic of expanding on freezing. This expansion, which can continue for hours or even days after freezing, has proven to be a useful property in many processes.

Fusible Alloys are classified as either eutectic or non-eutectic. In eutectic alloys, the melting point coincides with the freezing point. Non- eutectic alloys exhibit a range between the melting and freezing point in which the material is “mushy” or “pasty”.

Fusible Alloys are used for lens blocking and tube bending, for anchoring chicks and fixtures and for mounting thin sections such as gas turbine blades for machining. The eutectic fusible alloys, which can be tailored to give a specific melting point, find applications in temperature control devices and in fire protection devices.

Shipped quantities will be adjusted to best fit the specific ingot size available, and may be more or less than the quantity ordered. Invoice will reflect the quantity shipped.


Product Documents

158 Eutectic Bar Application Note 1

158 Eutectic Bar Application Note 2



Weight 1.70 kg
Dimensions 34.29 × 25.4 × 8.89 cm

Each hexagonal cake has a net weight of 3.75 lbs.


50Bi 26.7Pb 13.3Sn 10Cd

Minimum Purity


Unit of Measure

Each cake of 3.75 Lbs


Regular Hexagon

Side length

2.30 in

Long diagonal

4.62 in

Short diagonal

4.00 in


0.75 in (Approx.)

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