Roto144F Low Melt Fusible Ingot Alloy (Field's Metal) -4 ounces

Sold by the Ingot i.e. 1 Quantity = 1/4 Pounds or 4 ounces

Field’s Metal (also known as Field’s Alloy) is a high‑performance low‑melting fusible alloy designed for applications requiring precise thermal control and safe handling. Named after Simon Quellen Field, this alloy transitions cleanly from solid to liquid at approximately 62 °C (144 °F), making it ideal for low‑temperature casting, thermal fuses, prototyping, mold making, and scientific demonstrations.

This eutectic alloy contains 32.5% Bismuth, 51% Indium, and 16.5% Tin, giving it a sharp, predictable melting point and excellent fluidity when molten. Because it contains no lead or cadmium, Field’s Metal is a non‑toxic alternative to Wood’s Metal, offering similar performance without hazardous materials.

With a density of approximately 7.9 g/cm³, Field’s Metal provides a substantial feel and reliable mass‑to‑volume consistency for precision casting and engineering calculations.

Key Features

• Melting point: 62 °C (144 °F)
• Composition: 32.5% Bi / 51% In / 16.5% Sn 
• Density: ~7.9 g/cm³
• Lead‑free and cadmium‑free for safer handling
• Eutectic alloy for clean, consistent melting behavior

Excellent for low‑temperature casting, heat transfer experiments, safety devices, and precision molds

SDS Sheet click here