Wei Ouding 204 copper welding wire copper welding wire Note: Genuine Wei Ouding 204 copper welding wire copper welding wire from Weiou Ding (Tianjin) Welding Technology Co., Ltd. There are many companies and individuals theft of my company The picture and text information, foreign sales Wei Ouding special welding materials, many users blindly take a lot of detours, and users suffer a certain amount of economic loss, hereby tips! Weiou fake provenance more places are: Hebei Xingtai, Hebei Tangshan, Hebei Shijiazhuang, Zhejiang, Fujian. At the time of purchase, please contact the dealer to see whether my company and our company. Description: Wei Ouding 204 copper welding wire is copper wire containing a small amount of special silicon, manganese, phosphorus and other elements added deoxy molten copper, tin improved liquidity has excellent welding performance, weld good, high mechanical properties. crack resistance and good purposes: for copper welding and oxygen - acetylene gas welding Chemical composition (%) Mn Si Sn P Cu 0.2 ~ 0.5 0.2 ~ 0.5 0.5 ~ 1.0 0.02 ~ 0.15 as a filling material I amount Note: 1. oxide edges and wire welding workpiece surface, oil, dirt must be cleaned before welding may cause pores, slag and other defects, performance degradation weld thickness of less than 2. butt joints. When 3mm, without groove; when the thickness of 3 to 10mm, open 60 ° ~ 70 ° V-groove; when the thickness is greater than 10mm, open 60 ° ~ 70 ° X-groove to avoid lack of penetration. 3. usually without leaving a blunt edge of the workpiece must be preheated before welding preheat temperature of less than 3mm thickness of 150 ~ 300 ℃;.. When the thickness is greater than 3mm, preheat temperature of 350 ~ 500 ℃ 4. If using TIG welding. DC positive polarity welding.