Introduction: Harris Corporation was founded in 1992 and is a global multinational company with nearly a century of history. It is recognized as the world's leading supplier of high-quality welding materials. We mainly produce high-quality soldering, brazing, and welding alloys, with a market targeting 85 cities worldwide. Harris solder metal is used in various industries, including the appliance and equipment industry, air conditioning and refrigeration industry, piping industry, welding operations, automotive and construction industry. J. W. Harris established a set of brazing alloy gold standards many years ago. Currently, the company still holds a leading position in the industry due to the excellent quality of its products. Harris Corporation's product quality, production system, and service system have all obtained ISO9000 certification from the International Organization for Standardization. At present, the main product series include: phosphor copper welding rod series, aluminum welding rod series, tin silver soft welding rod series, solder flux series, lead-free solder series, and high silver welding rod series; Harris produces the world's highest quality phosphor copper welding rods. Harris' patented production technology is still unique in today's welding alloy production. The phosphorus content of welding rods is controlled to be 5 times stricter than industrial requirements. In addition, strict control means that the product has absolute reliability in terms of application and performance.