Domestic fasteners and their existing problems

At home and abroad, there are about 40,000 varieties and millions of fasteners in various forms and specifications. Their use occasions and the environment are ever-changing. Industrial aluminum fittings, as the connecting parts of the mainframe and components, bear the basic performance of the main body and the basic functions of the components, must meet the requirements of high temperature, high pressure, low temperature, vibration, corrosion, heavy load, alternating stress, and resistance. Shear and twisting and other occasions. However, the probability of accidents caused by fastener failure is very high, so the materials used to make fasteners must be carefully selected in advance.

Many domestic fastener companies suffer from high customer claims due to product quality problems. It is true that many quality problems are caused by unqualified materials. How to correctly select fastener materials becomes one of the topics that fastener companies are increasingly concerned about.

Regarding the status quo and existing problems of China's fasteners for industrial aluminum fittings, the material consultant of the Fasteners Professional Association of China Machinery General Components Industry Association stated: "Our country is currently a fastener producing country and is the world's largest. Steel-producing countries, but the development of production and production of fastener steels started late.The types and specifications of cold heading steels are relatively small, and they can not meet the current domestic demand for fastener production and export demand.The production and market circulation of cold heading steel Many of the steel grades in G3506, G3507, G4105, and ASTM in the JIS standard have also been heavily borrowed.