Newton's metal

{{short description|Low-melting-point alloy of bismuth, lead and tin}}

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.{{Cite journal

|title=Newton's metal as a new home-made shielding material

|journal=Radiation Effects and Defects in Solids

|first1=M. |last1=Kamal |first2= B. M.|last2= Moharam |first3= H. I.|last3= Farag |first4= A.

|last4=El-Bediwi |first5= Hany A.|last5= Shosha |first6= H. F. |last6=Aboshieasha

|volume=162

|issue=1

|pages=53–57

|publisher=Taylor & Francis

|doi=10.1080/10420150601045382

|year=2007

|bibcode=2007REDS..162...53K

|s2cid=96975665

}}