易熔合金/低熔點合金

Fusible alloys, known for their lower melting points compared to solder alloys, are easily liquefied with moderate heat, making them ideal for temporary solid state during processing or as temperature sensors, such as in fire detection sprinkler systems. Originally developed in the 19th century and known by names such as Field’s metal, Wood’s metal, and Rose’s metal, these alloys have evolved with modern materials technology to include precise compositions like Indalloy®117, Indalloy®158, and Indalloy®19, delivering consistent melting behavior across an extended temperature range.

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Lens Blocking using Fusible Alloys or Low Melting Point Alloys

產品總覽

Fusible alloys, characterized by their low melting points as low as 47°C (117°F), offer remarkable versatility by transitioning seamlessly between solid and molten states. This unique property makes them indispensable for precise and temporary applications. These alloys serve as excellent as precision support materials, securely holding and protecting workpieces during crucial finishing processes, such as polishing and grinding. Additionally, the eutectic melting points of fusible alloys facilitate passive activation systems, ensuring the reliable and safe operation of devices like fire sprinklers without the need for electronic circuitry, thereby enhancing safety and simplicity.

最大範圍的可用合金成分

Field’s metal, Wood’s metal, and many other alloy compositions are available. Available melting points start at 47°C/117°F and go up into the solder alloy range at above 200°C.

Lens Blocking for Grinding and Polishing with Indalloy^®117 & Indalloy^®19

Indalloy^®117 and Indalloy^®19 are the most popular alloys for lens blocking in the optical lens grinding industry, with melt points at 47°C/117°F and 60°C/140°F, respectively.

精確啟動消防灑水系統

Melting activation is solely controlled by environmental temperature and thus enables the design of completely passive devices for fire detection. Indalloy^®158 is a popular alloy choice for fire sprinkler systems.

Custom Alloy Development

Melting behavior is determined by precise control of the alloy composition. We offer a wide range of alloy options and melting points. We also work with customers to develop custom alloys with target melting points and other properties tailored to their application needs.

優點

Explore our large range of Indalloy® offerings and contact our technical support team if you need a specific temperature range for the desired melting point.

Indalloy®117

Lowest melting point in the bismuth-based fusible alloy system
廣泛用於鏡片封接，以加工光學鏡片

Indalloy®19 (Field’s Metal)

Indium-Bismuth-Tin (InBiSn) alloy
Popular lead-cadmium free alternative in lens grinding
Melting point at 60°C (140°F)

Indalloy®158 (Wood’s Metal)

由 B. Woods 於 1860 年首次取得專利
Melting point at 70°C (158°F)

無鉛、無鎘合金選項

Numerous alloy options available
Indalloy®19 and Indalloy®281 are our most popular alloys

易熔合金/低熔點合金產品

許多易熔合金都是以鉍（Bi）合金系統為基礎。其他金屬（錫 (Sn)、铟 (In) 以及許多其他金屬）會改變熔點，因此需要確保合金成分的精確控制。以下是我們最常用合金的幾個範例 (這些合金都是共晶系統，其液相點與固相點重合)：

Indalloy #	117	136	19	158	281
合金成分	44.7 Bi 22.6 Pb 19.1 In 8.3 Sn 5.3 Cd	49 Bi 21 In 18 Pb 12 Sn	51 In 32.5 Bi 16.5 Sn	50 Bi 26.7 Pb 13.3 Sn 10 Cd	58 Bi 42 Sn
液體溫度 (°C)。	47 (117)	58 (136)	60 (140)	60 (140)	138 (281)
E = 共晶	E	E	E	E	E