AQSIQ released before the holiday 4 2010 batch product quality supervision and inspection results, including, stainless steel Welding Electrodes and alkaline products pass rate of 84.8%. The total sample of Beijing, Tianjin, Hebei, Liaoning, Shanghai, Jiangsu, Zhejiang, Shandong, Hunan, Hubei, Guangxi and other 11 provinces, autonomous regions and municipalities, 46 companies produced 46 kinds of Stainless Steel Welding Electrode and alkaline products . One sample of 33 kinds of stainless steel welding rod products, 13 Alkaline carbon steel electrode products. The sampling based on "stainless steel electrode" GB/T983-1995, "carbon steel electrode" GB/T5117-1995 at the request of stainless steel welding rod products C, Si, Mn, S, P, Cu, Mo, Cr, Ni, Tensile strength, Elongation, 11 projects have been tested; carbon steel electrode for alkaline products, Mn, Si, S, P, Cr, Ni, Mo, V, tensile strength, yield strength, elongation rate, the impact energy absorption, X-ray inspection and other 13 projects have been tested. Spot checks found that seven kinds of stainless steel electrode product does not meet the relevant standards, failed projects involving nickel, chromium, tensile strength, elongation rate.
The electrode Aluminium Welding Electrodes and drug skin of two parts. The electrode is outside the core of metal welding, coating (drug skin) uniform pressure applied to the welding core carefully. Different types of electrode welding core. Ie, electrode welding core metal core, in order to ensure the quality and performance of the weld, butt the content of metal elements in the core there are stringent regulations, especially the content of harmful impurities (such as sulfur, phosphorus, etc.), there should be strict restrictions, better than the parent metal. Welding core composition directly affect the composition and performance of the weld metal, so the harmful elements in the Aluminum Electrode as little as possible. Welding of carbon steel and low alloy steel welding core, generally use low-carbon steel core as welding, manganese, silicon, chromium, nickel, and fill up the ingredients (see wire national standard GB1300-77). The one hand, low-carbon and low carbon content steel wire plastic, easier to wire drawing, on the other hand can reduce the reducing gas CO concentration, reduce spatter or porosity can be increased weld metal solidification temperature, beneficial to the overhead position welding. Adding other alloying elements in order to ensure the comprehensive mechanical properties of the weld, welding performance and to remove impurities, but also have a certain effect. Other high-alloy steel, aluminum, copper, iron and other metal materials, the composition of the solder core addition to asking the weld metal are similar, the same should also control the content of impurities, according to process requirements often by adding certain alloying elements. The electrode is coated with a drug skin for SMAW consumable electrode, which is a medicated skin and welding core composed of two parts. Electrode front-end drug skin around the 45 ° chamfer, in order to facilitate arc. Some bare welding core in the tail, about the Welding Electrode Manufacturers length of 1/16, to facilitate the welding clamp hold and conductivity. Electrode diameter Chung actually refers to the solder core diameter) is usually 2,2. 5,3. 2 or 3, 4, 5 or 6mm several specifications, it is common 3. 2, 4, 5 its length "L" is generally between 250 ^ -450 mm. Stainless steel electrode.