Welding of metals has found its wide application for a very long time, and today not a single production can do without welding. welding with welding wire is gaining great popularity for its high manufacturability, convenience and excellent weld quality. The various types of this material for welding are designated by certain numerical and letter combinations.
The letters "Sv" are deciphered simply - "welding wire". Next are two numbers indicating the carbon content in hundredths of a percent. Then the letters indicate the main alloying elements that are in the wire. If these elements are more than 1%, then after the letter another number is put, which shows their percentage. Marking Sv-08GA stands for "welded wire with a carbon content of 0.08%, manganese less than 1%." The letter "A" at the end of the designation of this low-alloy wire means that it contains no sulfur and phosphorus at all, or their content is minimal. And welding wire 04x19n11m3 is an abbreviated notation that it contains 0.04% carbon, 19% chromium, 11% nickel and 3% molybdenum.
Glories of metals have different physical properties and not the same ability to form a welded joint. The composition and properties of sv significantly affect the quality of the fusion in the weld. When choosing between the main types of wire (low carbon, low alloy and high alloy), it is important to take this into account. In addition to differences in the chemical composition and the presence of alloying components, the welded wire may also differ in the structure of the rod.
Allocate a flux-cored welding wire, which is used to connect carbon steels. Such seams will withstand heavy loads, heat and pressure. This type of welding material is a long electrode made of a thin metal shell, inside which there is a special powder of slag and gas-forming components.
Steel copper-plated welding wire is used for welding low-alloy steel. The surface of this joint will have anti-corrosion and anti-abrasion properties. The thickness and reliability of the seam will depend on the selected wire diameter. All the advantages and advantages of welding wire over brittle electrodes can be assessed only by choosing the right material for welding, which is represented today by a wide variety of structure, composition and technological parameters.
