Status Quo of Steel Used for Fasteners and Discussion on Existing Problems

According to rough statistics, there are about 40,000 varieties and millions of kinds of fasteners in various forms at home and abroad, and their use situations and environment are ever-changing. Fasteners are used as the connecting parts of the host and the components, and together with the host, they are responsible for the basic performance of the main body and the requirements for the basic functions of the components. They must adapt to high temperatures. high pressure. Low temperature. shock. Corrosion, heavy load, alternating stress, shear and anti-twist, 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.

In recent years, many fastener companies in China have encountered high customer claims one after another 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 current status and existing problems of fastener steel in China, Shen Gong, a material consultant for Fastener Professional Association of China Machinery General Parts Industry Association, stated: “Our country is currently the largest producer of fasteners and the world’s largest steel producer. Great powers, but the development of production and production of fastener steels started late.The types and specifications of cold heading steels are relatively small, which can not meet the current domestic demand for fasteners production and export demand.The production and market circulation of cold heading steel A lot of steel grades in the JIS standards G3506, G3507, G4105, and ASTM are used."