What is solder, which types, and how to choose tin-lead solder

The metal alloy material used to fill the weld, surfacing layer and brazing seam during welding is called solder. At present, there are mainly two types of solders: lead-free and lead-containing, and the forms include soldering wire, soldering rod, and solder. There is also semi-liquid solder paste. Lead-tin solder. Mainly tin-lead alloy, and some tin solder also contains a small amount of antimony. A tin alloy containing 37% lead and 63% tin is commonly called solder, with a melting point of about 183°C. This is the most common tin-lead soldering.The difference in the content of tin-lead and the added metal results in the difference in the melting point, thermal expansion coefficient, inherent stress and solidification time of tin-lead solder. Therefore, look at what you need and choose a solder with the right melting point and performance.

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Brazing can be divided into two categories, soft brazing and brazing

A welding method in which a metal material with a lower melting point than the base material is used as the solder, and the liquid solder is used to wet the base material and fill the gap between the workpiece interface and make it diffuse with the base material. The brazing deformation is small, and the joints are smooth and beautiful. It is suitable for welding precise, complex components and components composed of different materials, such as honeycomb structural plates, turbine blades, cemented carbide tools and printed circuit boards. Before brazing, the workpiece must be carefully processed and strictly cleaned to remove oil stains and excessively thick oxide film to ensure the interface assembly gap. The gap is generally required to be between 0.01 and 0.1 mm. According to the different welding temperature, brazing can be divided into two categories. Welding heating temperature lower than 450 ℃ is called soft soldering, higher than 450 ℃ called brazing.
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Four Popular Types of Welding Procedures

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The four main types of welding are: Gas Metal Arc Welding (GMAW/MIG), Gas Tungsten Arc Welding (GTAW/TIG), Shielded Metal Arc Welding (SMAW), and Flux Cored Arc Welding (FCAW) Gas Metal Arc Welding (GMAW/MIG) Also known as Metal Inert Gas or MIG welding, this process uses a thin wire as an electrode. The wire heats up as it is fed through the welding instrument and towards the welding site. Shielding gas must be used to protect the weld from contaminants in the air. Typically, this comes in the form of carbon dioxide, oxygen, argon or helium. This method is often used to work on metals such as stainless steel, copper, nickel, carbon steel, aluminum, and more. Of all the welding processes, this one is most popular across the construction and automotive industries. Gas metal arc welding is believed to be one of the easier welding techniques to learn, which makes it a great area of focus for beginning welders. It also calls for minimal cleanup, offers high welding speeds and better contro...
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Need filler metal for brazing, soldering or welding applications?

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A filler metal is a metal added in the making of a joint through welding, brazing, or soldering. Four types of filler metals exist—covered electrodes, bare electrode wire or rod, tubular electrode wire, and welding fluxes. Sometimes non-consumable electrodes are included as well, but since these metals are not consumed by the welding process, they are normally excluded.   A variety of alloys are used as filler metals for brazing depending on the intended use or application method. Such as Copper, Copper-zinc(brass), Nickel alloy and Silver. In general, braze alloys are made up of three or more metals to form an alloy with the desired properties. The filler metal for a particular application is chosen based on its ability to: wet the base metals, withstand the service conditions required, and melt at a lower temperature than the base metals or at a very specific temperature. Braze alloy is generally available as rod, ribbon/strips, powde...
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