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Lead-free solder wireIs it really lead-free? What are its standards,Generally, if we classify solder wires according to the metal alloy materials, they can be divided into tin-lead alloy solder wires, pure tin solder wires, tin-copper alloy solder wires, tin-silver-copper alloy solder wires, tin-bismuth alloy solder wires, tin-nickel alloy solder wires and solder wires made of special tin-containing alloy materials. Therefore, there are distinctions when making judgments. The surface of lead-containing solder appears bright white. Lead-free solder is light yellow. If you distinguish them by rubbing with your hand: lead-containing ones will leave black marks on your hand, while lead-free ones will leave light yellow marks, because lead-free ones usually contain copper metal. Now, let JJY Soldering Factory tell you all about it;
First, let's understand what lead-free solder wire is:
The extreme harm of lead poisoning and its damage to the environment have been widely recognized. Lead-free solder wire is an upgraded alternative to lead-free products. It was first proposed as an EU standard set by EU countries to protect the health of operators and the environment, which we collectively refer toROSHInstruction.ROSHThe purpose of the directive is to restrict the use of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers. All metal indicators of the solder wire must not be exceededROSHThis is the standard, and this kind of solder wire is called lead-free solder wire
Now, let's introduce to you the detailed parameters and features of low-temperature solder wire:
Low-temperature environmentally friendly lead-free solder wire
Brand:JIAJINYUAN/JJY
Alloy composition:Sn42Bi58
Processing and customization: Yes
Welding wire diameter: 0.8(mm)
Melting point:227(℃)
Whether it conforms or notRoHSYes (fits)
Weldable: Copper parts, tin-plated copper parts, etc
Working temperature:280~300(℃)
Specification:50~20000(g)
Characteristics of low-temperature lead-free solder wire:
1"Conform to"ROHSEnvironmental protection requirements.
2It has good solderability, excellent wettability and good expansion.
3It has a low melting point and a low welding operation temperature, reducing thermal shock to components.
4It can be made into rosin cores or solid cores (solid core models are required for convenient welding.)
5It is suitable for soldering electronic components that cannot withstand high temperatures.
Low-temperature environmentally friendly lead-free solder wire is made by dissolving, refining and removing impurities from lead-free pure tin, pure copper and pure silver in proportion with other environmentally friendly alloys at high temperatures, casting them into tin cylinders, and then die-casting them with a hydraulic press and flux (rosin agent). It is produced and drawn into solder wires of different sizes according to different wire diameter requirements by a wire drawing machine. The alloy composition is divided into tin-copper, tin-silver, tin-silver-copper alloy or other alloys. The flux is evenly poured into the middle part of the tin alloy.
Lead-free low-temperature solder wireStorage and shelf life:
There are two types of lead-free low-temperature solder wires: one with rosin core and the other with solid core. Their storage methods and shelf lives are also different. Rosin core low-temperature solder wires can generally be stored for a long time in vacuum packaging. Vacuum packaging can reduce the oxidation of the solder wire, and it is necessary to ensure that the packaging is not damaged and the solder wire is not exposed to dust and other substances. In addition, solid tin wire can have an indefinite shelf life. Lead-free low-temperature solder wire should be stored in a well-ventilated, dry and non-corrosive environment and properly labeled.
The solder paste of Shenzhen JJY brand has gone through many years12A solder paste and wire manufacturer specializing in the annual research and development of solder paste, solder wire, solder wire, lead-free solder paste, leaded solder paste, solder rods, leaded solder paste, etc. Choose the solder paste manufacturer of JJY brand for solder paste
