Newton's metal is a fusible alloy with a low melting point.
Its composition by weight is 8 parts bismuth, 5 parts lead and 3 parts tin; its melting point is 97 °C.
Newton's metal is comparable to Cerrobend, but avoids its toxic cadmium content.
This has encouraged its use for medical applications for easily shaped shielding during radiotherapy.
This alloy-related article is a stub.