Description

Wood's Alloy is a low-melting-point fusible alloy, also known commercially as Wood's Metal, with the CAS registry number 8049-22-7. This specialized bismuth-based alloy is valued for its precise and reliable melting point, which is critical for applications requiring controlled thermal activation or safety shutdown. It is an essential material for manufacturers and engineers in sectors such as electronics, fire safety, and precision tooling, where predictable phase-change behavior is paramount.

Application

• Thermal Fuses and Safety Devices: Used as the fusible element in sprinkler systems, electrical overload protectors, and fire door releases.
• Precision Casting and Molding: Serves as a low-melting-point mold material for creating intricate patterns or for holding delicate parts during machining.
• Temperature Calibration: Acts as a reference standard for calibrating thermostats, ovens, and other temperature-sensitive equipment.
• Soldering and Joining: Employed for step-soldering temperature-sensitive electronic components or joining materials that cannot withstand high heat.
• Metalworking and Bending: Used as a filler to support thin-walled tubes and pipes during bending operations to prevent collapse.
• Physics Demonstrations and Educational Kits: Popular in laboratory settings to demonstrate low-temperature melting and casting principles.

Basic Information

Product Name	Wood's Alloy
CAS No.	8049-22-7
Molecular Formula	Typically Bi-Pb-Sn-Cd alloy
Molecular Weight	N/A (Alloy)
Synonyms	Wood's Metal; Fusible Alloy 158; Lipowitz's Alloy; Bismuth-Lead-Tin-Cadmium Alloy; Low Melting Point Alloy; Field's Metal (variant); Cerrobend (trade name); Cerrobase (trade name); Eutectic Alloy 158
EINECS	Contact for details

Quality Control

Our Wood's Alloy is manufactured to precise compositional standards to ensure consistent melting point and physical properties. Each batch is verified for conformance to typical industry specifications, including limits on major and trace metallic impurities. A Certificate of Analysis (COA) detailing lot-specific composition, melting range, and density is provided to guarantee performance and traceability for your quality systems.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	Silvery metallic solid
Typical Composition	Bismuth 50%, Lead 26.7%, Tin 13.3%, Cadmium 10%
Melting Point	~70°C (158°F)
Density	~9.7 g/cm³
Assay (Metallic Purity)	>99.5% (Total metals)
Identification (XRF/OES)	Conforms

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.