Field's metal, or Field's alloy (named after Simon Quellen Field), is a fusible alloy that becomes liquid at approximately 62 °C (144 °F). It is a eutectic alloy of bismuth, indium, and tin, with the following percentages by weight: 32.5% Bi, 51% In, 16.5% Sn. As it contains no lead nor cadmium, it is a non-toxic alternative to Wood's metal.

It is used for die casting and easy prototyping.