Special and fusible solders
|Rose's metal||25 %||25 %||50 %||—||—||—||—|
|Wood's alloy||12,5 %||25 %||50 %||—||12,5 %||—||—|
|Soldier brand A||42-45%||—||—||54%||—||1,2-1,5%||—|
Rose's metal is similar to the Wood's alloy, but differs from it by less toxicity, so it does not contain cadmium. Rose' metal is used for semiconductor technology, soldering components sensitive to overheating, brazing of aluminum, aluminum, copper and its alloys in the assembly joints, aluminum alloys with each other, for soldering and tinning of copper, nickel, brass, bronze, copper and copper-nickel alloy with silver plated ceramics, silver-plated soldering components, soldering and tinning of jewelry. Use in radio as a solder WWTP-50.
Wood’s alloy is a heavy fusible alloy, invented by Robert Williams Wood. Melting Point is 65,5° C, density is 9720 kg/cubic meter. It is suitable for soldering copper, non-metals by electrolytic coating of silver, tin-lead or tin-bismuth, tin-plating of printed circuit boards, laboratory use, etc. This alloy is used for the tinning of printed wiring boards, precision casting, bending operations in thin-walled tubes as rods melted in the manufacture of hollow bodies electroforming method.
Solder brand A
Solder A brand is one of the most popular varieties of tin-copper- zinc solders. These are the three main components make up its foundation and determine and main properties, and areas where its use will be different maximum efficiency.
It is perfect for use in the process of brazing aluminum conductors and perform tinning of aluminum shells. This favors the fact that it is quite resistant to the adverse effects of corrosion and has excellent processing properties. Important and the melting temperature of the compound. It varies in the range from 300 to 320 ° C. While the density of this type of solder is 7.2 g / cm3. All of this should be taken into account during tinning and soldering products.
The solder composition predominates zinc content, the amount ranges from 56% to 59%, tin in the compound of not more than 42.1% and not less than 38.6%. Copper component is less than 2%, in some cases, its presence may not exceed the figure of 1.5%. And it determines most of the properties of solder, the appropriateness of its use in certain areas as well as a number of other important indicators.
Sn36Pb60Bs4 solder falls into the category of low-melting and tin-lead- bismuth solders. In its structure, as can be understood from the classification predominant content of components such as bismuth, lead and tin, taken in the specified amounts. And it causes and the main areas of its use, and the main features and characteristics.
The need to use this compound can occur during tinning of printed circuit boards, soldering manufacturing step that prevent overheating of more than 200 ° C. It is characterized by an excellent ability to flow and move quickly from a liquid state - a solid. Another important advantage of solder formed in accordance with the WWTP mark is that it can not be completely negative effects of different environments, is resistant to corrosion.
Affect the choice of solder and applications such circumstances, as the density of the solder, the melting point and tensile strength. In this case WWTP solder melting temperature does not exceed a level of 130 degrees and at the same time can not be less than 120 degrees Celsius. Its tensile strength corresponds to the mark of 58.9 MPa, and a density of 9300 kg / m3.umestnost its use in certain areas as well as a number of other important indicators.