The model of the welding rod is CHS022; what do the letters CHS stand for?

This is a grade from an Atlantic manufacturer; the standard code should be E316

CHS is the code for Atlantic welding materials in Sichuan, used to identify stainless steel electrodes. Instructions for using stainless steel welding electrodes: Stainless steel welding electrodes are those in which the chromium content in the deposited metal is greater than 11%, and the iron content exceeds that of any other element. Those of this type that meet national standards are evaluated in accordance with the national standard GB/T 983-2012. Chromium stainless steel welding electrodes possess certain corrosion resistance (against oxidizing acids, organic acids, and cavitation) as well as heat resistance. It is commonly chosen as a material for equipment in power plants, the chemical industry, the petroleum sector, and so on. However, chromium stainless steel generally has poor weldability, so attention should be paid to the welding process, heat treatment conditions, and the selection of appropriate welding electrodes. High-chromium steel (containing 12–17% chromium) has a high tendency to harden. When welded using chromium stainless steel electrodes, it tends to form highly hard martensite and bainite, which increases brittleness; in addition, residual stresses are high, making cold cracks more likely to occur. Therefore, preheating to around 300°C before welding and tempering treatment after welding are generally necessary. Chromium-nickel stainless steel electrodes (such as CHS107, CHS207) can also be used to weld chromium stainless steel, and no heat treatment is required after welding. Chromium-nickel stainless steel welding electrodes possess excellent corrosion resistance and oxidation resistance, and they are widely used in the manufacturing of equipment in the chemical, fertilizer, petroleum, food, and medical device industries. In recent years, with the development of China’s industry, there are now over thirty types of chromium-nickel stainless steel welding electrodes, which basically meet the needs of construction in the country. When welding chromium-nickel stainless steel, repeated heating leads to the formation of carbides, which reduces its corrosion resistance and mechanical properties. Therefore, when welding such steel, it is necessary to select the appropriate welding electrode based on the operating conditions of the equipment (such as working temperature and type of medium). The following points should also be taken into consideration during use: 1. There are generally three types of fluxes for stainless steel welding electrodes: rutile-type, titanate-type, and basic-type fluxes. For stainless steel electrodes with rutile and titanate-type flux coats, the AC welding arc penetration is shallower, which may lead to defects such as lack of fusion at the root of the weld; therefore, DC welding should be used whenever possible. Stainless steel electrodes with alkaline flux coats have better crack resistance and are suitable for welding under high constraint conditions. 2. To prevent intergranular corrosion caused by heating, the current used during welding should not be too high; it should generally be about 20% lower than that used with carbon steel electrodes. Additionally, the arc length should not be too long, rapid cooling between layers is necessary, and welding in narrow passes is preferred. 3. The amount of ferrite in the weld is determined based on the chemical composition, by referring to Schaefer’s charts, Dietl’s diagrams, and WRC-1992.

CHS is the manufacturer’s code; the actual grade is: A022； Model E316L

Manufacturer code! The selection of welding electrodes should refer to the models and grades specified in the **standards.