| 摘要 |
Alloy composition for a heat sensitivity element of a sprinkler is provided to manufacture the heat sensitivity element by using predetermined composition of harmlessness materials instead of noxious materials, so that a human being is not exposed to the noxious materials, and the heat sensitivity element matches with world wide trend to ban the use of harmful metal. A heat sensitivity element is made of Bi in the range of 32.8 weight% to 49.6 weight%, Si in the range of 12.7 weight% to 24.52 weight%, In in the range of 33.88 weight% to 39.0 weight%, Zn in the range of 2.8 weight% to 3.47 weight% of Zn, and Ag in the range of 0.3 weight% to 3.8 weight%. The heat sensitivity element is made of Bi having 35.8 weight%, Sn having 21.2 weight%, In having 39 weight%, Ag having 0.53 weight%, and Zn having 3.47 weight%. The heat sensitivity element consists of 44.5weight% Bi, 12.8 weight% Sn, 39 weight%In, 0.3 weight% Ag, and 3.4weight% Zn. |
